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Finding the Fourth Proportional to 48,659.40, 72,980.76 and 13,590.96

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Solution

The fourth proportional to 48,659.40, 72,980.76 and 13,590.96 is: 20,384.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    48,659.40 : 72,980.76 = 13,590.96 : x
  2. Step 2: Convert to fraction form
    48,659.40/72,980.76 = 13,590.96/x
  3. Step 3: Cross multiply
    48,659.40x = 72,980.76 × 13,590.96
  4. Step 4: Simplify right side
    48,659.40x = 991,878,589.93
  5. Step 5: Solve for x
    x = 991,878,589.93/48,659.40
  6. Step 6: Final answer
    x = 20,384.11

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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.