Home / 20,886.53-31,337.72-12,572.28

Finding the Fourth Proportional to 20,886.53, 31,337.72 and 12,572.28

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Solution

The fourth proportional to 20,886.53, 31,337.72 and 12,572.28 is: 18,863.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,886.53 : 31,337.72 = 12,572.28 : x
  2. Step 2: Convert to fraction form
    20,886.53/31,337.72 = 12,572.28/x
  3. Step 3: Cross multiply
    20,886.53x = 31,337.72 × 12,572.28
  4. Step 4: Simplify right side
    20,886.53x = 393,986,574.69
  5. Step 5: Solve for x
    x = 393,986,574.69/20,886.53
  6. Step 6: Final answer
    x = 18,863.19

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.