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Finding the Fourth Proportional to 40,404.60, 55,739.16 and 28,474.50

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Solution

The fourth proportional to 40,404.60, 55,739.16 and 28,474.50 is: 39,281.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,404.60 : 55,739.16 = 28,474.50 : x
  2. Step 2: Convert to fraction form
    40,404.60/55,739.16 = 28,474.50/x
  3. Step 3: Cross multiply
    40,404.60x = 55,739.16 × 28,474.50
  4. Step 4: Simplify right side
    40,404.60x = 1,587,144,711.42
  5. Step 5: Solve for x
    x = 1,587,144,711.42/40,404.60
  6. Step 6: Final answer
    x = 39,281.29

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.