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Finding the Fourth Proportional to 12,111.70, 18,167.55 and 10,653.70

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Solution

The fourth proportional to 12,111.70, 18,167.55 and 10,653.70 is: 15,980.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,111.70 : 18,167.55 = 10,653.70 : x
  2. Step 2: Convert to fraction form
    12,111.70/18,167.55 = 10,653.70/x
  3. Step 3: Cross multiply
    12,111.70x = 18,167.55 × 10,653.70
  4. Step 4: Simplify right side
    12,111.70x = 193,551,627.44
  5. Step 5: Solve for x
    x = 193,551,627.44/12,111.70
  6. Step 6: Final answer
    x = 15,980.55

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Similar ratio
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1.5x scale

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.