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Finding the Fourth Proportional to 42,449.76, 63,674.40 and 10,859.78

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Solution

The fourth proportional to 42,449.76, 63,674.40 and 10,859.78 is: 16,289.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,449.76 : 63,674.40 = 10,859.78 : x
  2. Step 2: Convert to fraction form
    42,449.76/63,674.40 = 10,859.78/x
  3. Step 3: Cross multiply
    42,449.76x = 63,674.40 × 10,859.78
  4. Step 4: Simplify right side
    42,449.76x = 691,489,657.26
  5. Step 5: Solve for x
    x = 691,489,657.26/42,449.76
  6. Step 6: Final answer
    x = 16,289.60

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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.