Home / 15,021.69-20,729.51-8,307.09

Finding the Fourth Proportional to 15,021.69, 20,729.51 and 8,307.09

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Solution

The fourth proportional to 15,021.69, 20,729.51 and 8,307.09 is: 11,463.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,021.69 : 20,729.51 = 8,307.09 : x
  2. Step 2: Convert to fraction form
    15,021.69/20,729.51 = 8,307.09/x
  3. Step 3: Cross multiply
    15,021.69x = 20,729.51 × 8,307.09
  4. Step 4: Simplify right side
    15,021.69x = 172,201,905.23
  5. Step 5: Solve for x
    x = 172,201,905.23/15,021.69
  6. Step 6: Final answer
    x = 11,463.55

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Half scale
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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.