Home / 20,602.29-28,423.12-13,440.62

Finding the Fourth Proportional to 20,602.29, 28,423.12 and 13,440.62

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Solution

The fourth proportional to 20,602.29, 28,423.12 and 13,440.62 is: 18,542.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,602.29 : 28,423.12 = 13,440.62 : x
  2. Step 2: Convert to fraction form
    20,602.29/28,423.12 = 13,440.62/x
  3. Step 3: Cross multiply
    20,602.29x = 28,423.12 × 13,440.62
  4. Step 4: Simplify right side
    20,602.29x = 382,024,355.13
  5. Step 5: Solve for x
    x = 382,024,355.13/20,602.29
  6. Step 6: Final answer
    x = 18,542.81

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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.