Home / 20,423.18-28,182.92-13,707.87

Finding the Fourth Proportional to 20,423.18, 28,182.92 and 13,707.87

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Solution

The fourth proportional to 20,423.18, 28,182.92 and 13,707.87 is: 18,916.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,423.18 : 28,182.92 = 13,707.87 : x
  2. Step 2: Convert to fraction form
    20,423.18/28,182.92 = 13,707.87/x
  3. Step 3: Cross multiply
    20,423.18x = 28,182.92 × 13,707.87
  4. Step 4: Simplify right side
    20,423.18x = 386,327,735.04
  5. Step 5: Solve for x
    x = 386,327,735.04/20,423.18
  6. Step 6: Final answer
    x = 18,916.14

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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.