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Finding the Fourth Proportional to 40,720.62, 61,042.62 and 21,972.56

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Solution

The fourth proportional to 40,720.62, 61,042.62 and 21,972.56 is: 32,938.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,720.62 : 61,042.62 = 21,972.56 : x
  2. Step 2: Convert to fraction form
    40,720.62/61,042.62 = 21,972.56/x
  3. Step 3: Cross multiply
    40,720.62x = 61,042.62 × 21,972.56
  4. Step 4: Simplify right side
    40,720.62x = 1,341,262,630.51
  5. Step 5: Solve for x
    x = 1,341,262,630.51/40,720.62
  6. Step 6: Final answer
    x = 32,938.17

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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.