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Finding the Fourth Proportional to 23,326.60, 34,989.90 and 20,920.90

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Solution

The fourth proportional to 23,326.60, 34,989.90 and 20,920.90 is: 31,381.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    23,326.60 : 34,989.90 = 20,920.90 : x
  2. Step 2: Convert to fraction form
    23,326.60/34,989.90 = 20,920.90/x
  3. Step 3: Cross multiply
    23,326.60x = 34,989.90 × 20,920.90
  4. Step 4: Simplify right side
    23,326.60x = 732,020,198.91
  5. Step 5: Solve for x
    x = 732,020,198.91/23,326.60
  6. Step 6: Final answer
    x = 31,381.35

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1.5x scale

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.