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Finding the Fourth Proportional to 40,856, 56,404.32 and 30,902.72

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Solution

The fourth proportional to 40,856, 56,404.32 and 30,902.72 is: 42,663.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,856 : 56,404.32 = 30,902.72 : x
  2. Step 2: Convert to fraction form
    40,856/56,404.32 = 30,902.72/x
  3. Step 3: Cross multiply
    40,856x = 56,404.32 × 30,902.72
  4. Step 4: Simplify right side
    40,856x = 1,743,046,907.75
  5. Step 5: Solve for x
    x = 1,743,046,907.75/40,856
  6. Step 6: Final answer
    x = 42,663.18

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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.