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Finding the Fourth Proportional to 15,110.71, 20,851.68 and 8,395.99

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Solution

The fourth proportional to 15,110.71, 20,851.68 and 8,395.99 is: 11,585.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,110.71 : 20,851.68 = 8,395.99 : x
  2. Step 2: Convert to fraction form
    15,110.71/20,851.68 = 8,395.99/x
  3. Step 3: Cross multiply
    15,110.71x = 20,851.68 × 8,395.99
  4. Step 4: Simplify right side
    15,110.71x = 175,070,496.76
  5. Step 5: Solve for x
    x = 175,070,496.76/15,110.71
  6. Step 6: Final answer
    x = 11,585.86

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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.