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Finding the Fourth Proportional to 65,657.48, 98,471.82 and 18,900.20

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Solution

The fourth proportional to 65,657.48, 98,471.82 and 18,900.20 is: 28,346.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,657.48 : 98,471.82 = 18,900.20 : x
  2. Step 2: Convert to fraction form
    65,657.48/98,471.82 = 18,900.20/x
  3. Step 3: Cross multiply
    65,657.48x = 98,471.82 × 18,900.20
  4. Step 4: Simplify right side
    65,657.48x = 1,861,137,092.36
  5. Step 5: Solve for x
    x = 1,861,137,092.36/65,657.48
  6. Step 6: Final answer
    x = 28,346.15

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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.