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Finding the Fourth Proportional to 31,495.92, 43,462.80 and 20,317.92

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Solution

The fourth proportional to 31,495.92, 43,462.80 and 20,317.92 is: 28,037.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,495.92 : 43,462.80 = 20,317.92 : x
  2. Step 2: Convert to fraction form
    31,495.92/43,462.80 = 20,317.92/x
  3. Step 3: Cross multiply
    31,495.92x = 43,462.80 × 20,317.92
  4. Step 4: Simplify right side
    31,495.92x = 883,073,693.38
  5. Step 5: Solve for x
    x = 883,073,693.38/31,495.92
  6. Step 6: Final answer
    x = 28,037.72

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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.