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Finding the Fourth Proportional to 40,405.78, 60,541.84 and 20,657.17

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Solution

The fourth proportional to 40,405.78, 60,541.84 and 20,657.17 is: 30,951.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,405.78 : 60,541.84 = 20,657.17 : x
  2. Step 2: Convert to fraction form
    40,405.78/60,541.84 = 20,657.17/x
  3. Step 3: Cross multiply
    40,405.78x = 60,541.84 × 20,657.17
  4. Step 4: Simplify right side
    40,405.78x = 1,250,623,080.99
  5. Step 5: Solve for x
    x = 1,250,623,080.99/40,405.78
  6. Step 6: Final answer
    x = 30,951.59

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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.