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Finding the Fourth Proportional to 22,689.75, 31,311.87 and 12,753.75

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Solution

The fourth proportional to 22,689.75, 31,311.87 and 12,753.75 is: 17,600.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,689.75 : 31,311.87 = 12,753.75 : x
  2. Step 2: Convert to fraction form
    22,689.75/31,311.87 = 12,753.75/x
  3. Step 3: Cross multiply
    22,689.75x = 31,311.87 × 12,753.75
  4. Step 4: Simplify right side
    22,689.75x = 399,343,762.01
  5. Step 5: Solve for x
    x = 399,343,762.01/22,689.75
  6. Step 6: Final answer
    x = 17,600.18

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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.