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Finding the Fourth Proportional to 18,685,307.70, 28,027,961.55 and 17,173,653.30

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Solution

The fourth proportional to 18,685,307.70, 28,027,961.55 and 17,173,653.30 is: 25,760,479.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,685,307.70 : 28,027,961.55 = 17,173,653.30 : x
  2. Step 2: Convert to fraction form
    18,685,307.70/28,027,961.55 = 17,173,653.30/x
  3. Step 3: Cross multiply
    18,685,307.70x = 28,027,961.55 × 17,173,653.30
  4. Step 4: Simplify right side
    18,685,307.70x = 481,342,494,365,430.62
  5. Step 5: Solve for x
    x = 481,342,494,365,430.62/18,685,307.70
  6. Step 6: Final answer
    x = 25,760,479.95

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Double scale
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Similar ratio
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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.