Home / 20,343.10-28,071.02-11,389.90

Finding the Fourth Proportional to 20,343.10, 28,071.02 and 11,389.90

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Solution

The fourth proportional to 20,343.10, 28,071.02 and 11,389.90 is: 15,716.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,343.10 : 28,071.02 = 11,389.90 : x
  2. Step 2: Convert to fraction form
    20,343.10/28,071.02 = 11,389.90/x
  3. Step 3: Cross multiply
    20,343.10x = 28,071.02 × 11,389.90
  4. Step 4: Simplify right side
    20,343.10x = 319,726,110.70
  5. Step 5: Solve for x
    x = 319,726,110.70/20,343.10
  6. Step 6: Final answer
    x = 15,716.69

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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.