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Finding the Fourth Proportional to 40,810.80, 61,216.20 and 21,127.80

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Solution

The fourth proportional to 40,810.80, 61,216.20 and 21,127.80 is: 31,691.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,810.80 : 61,216.20 = 21,127.80 : x
  2. Step 2: Convert to fraction form
    40,810.80/61,216.20 = 21,127.80/x
  3. Step 3: Cross multiply
    40,810.80x = 61,216.20 × 21,127.80
  4. Step 4: Simplify right side
    40,810.80x = 1,293,363,630.36
  5. Step 5: Solve for x
    x = 1,293,363,630.36/40,810.80
  6. Step 6: Final answer
    x = 31,691.70

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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.