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Finding the Fourth Proportional to 23,156.90, 31,956.27 and 12,545.90

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Solution

The fourth proportional to 23,156.90, 31,956.27 and 12,545.90 is: 17,313.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    23,156.90 : 31,956.27 = 12,545.90 : x
  2. Step 2: Convert to fraction form
    23,156.90/31,956.27 = 12,545.90/x
  3. Step 3: Cross multiply
    23,156.90x = 31,956.27 × 12,545.90
  4. Step 4: Simplify right side
    23,156.90x = 400,920,167.79
  5. Step 5: Solve for x
    x = 400,920,167.79/23,156.90
  6. Step 6: Final answer
    x = 17,313.21

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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.