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Finding the Fourth Proportional to 41,980.40, 62,980.92 and 12,398.08

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Solution

The fourth proportional to 41,980.40, 62,980.92 and 12,398.08 is: 18,600.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    41,980.40 : 62,980.92 = 12,398.08 : x
  2. Step 2: Convert to fraction form
    41,980.40/62,980.92 = 12,398.08/x
  3. Step 3: Cross multiply
    41,980.40x = 62,980.92 × 12,398.08
  4. Step 4: Simplify right side
    41,980.40x = 780,842,484.63
  5. Step 5: Solve for x
    x = 780,842,484.63/41,980.40
  6. Step 6: Final answer
    x = 18,600.17

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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.