Home / 20,381.76-28,143.45-16,605.54

Finding the Fourth Proportional to 20,381.76, 28,143.45 and 16,605.54

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Solution

The fourth proportional to 20,381.76, 28,143.45 and 16,605.54 is: 22,929.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,381.76 : 28,143.45 = 16,605.54 : x
  2. Step 2: Convert to fraction form
    20,381.76/28,143.45 = 16,605.54/x
  3. Step 3: Cross multiply
    20,381.76x = 28,143.45 × 16,605.54
  4. Step 4: Simplify right side
    20,381.76x = 467,337,184.71
  5. Step 5: Solve for x
    x = 467,337,184.71/20,381.76
  6. Step 6: Final answer
    x = 22,929.19

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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.