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Finding the Fourth Proportional to 31,103.76, 42,923.07 and 16,957.38

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Solution

The fourth proportional to 31,103.76, 42,923.07 and 16,957.38 is: 23,401.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,103.76 : 42,923.07 = 16,957.38 : x
  2. Step 2: Convert to fraction form
    31,103.76/42,923.07 = 16,957.38/x
  3. Step 3: Cross multiply
    31,103.76x = 42,923.07 × 16,957.38
  4. Step 4: Simplify right side
    31,103.76x = 727,862,808.76
  5. Step 5: Solve for x
    x = 727,862,808.76/31,103.76
  6. Step 6: Final answer
    x = 23,401.12

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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.