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Finding the Fourth Proportional to 22,906.40, 34,385.20 and 21,402.40

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Solution

The fourth proportional to 22,906.40, 34,385.20 and 21,402.40 is: 32,127.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,906.40 : 34,385.20 = 21,402.40 : x
  2. Step 2: Convert to fraction form
    22,906.40/34,385.20 = 21,402.40/x
  3. Step 3: Cross multiply
    22,906.40x = 34,385.20 × 21,402.40
  4. Step 4: Simplify right side
    22,906.40x = 735,925,804.48
  5. Step 5: Solve for x
    x = 735,925,804.48/22,906.40
  6. Step 6: Final answer
    x = 32,127.52

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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.