Home / 20,340.29-28,071.96-12,387.17

Finding the Fourth Proportional to 20,340.29, 28,071.96 and 12,387.17

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Solution

The fourth proportional to 20,340.29, 28,071.96 and 12,387.17 is: 17,095.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,340.29 : 28,071.96 = 12,387.17 : x
  2. Step 2: Convert to fraction form
    20,340.29/28,071.96 = 12,387.17/x
  3. Step 3: Cross multiply
    20,340.29x = 28,071.96 × 12,387.17
  4. Step 4: Simplify right side
    20,340.29x = 347,732,140.75
  5. Step 5: Solve for x
    x = 347,732,140.75/20,340.29
  6. Step 6: Final answer
    x = 17,095.73

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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.