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Finding the Fourth Proportional to 44,604, 66,931.92 and 19,980

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Solution

The fourth proportional to 44,604, 66,931.92 and 19,980 is: 29,981.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    44,604 : 66,931.92 = 19,980 : x
  2. Step 2: Convert to fraction form
    44,604/66,931.92 = 19,980/x
  3. Step 3: Cross multiply
    44,604x = 66,931.92 × 19,980
  4. Step 4: Simplify right side
    44,604x = 1,337,299,761.60
  5. Step 5: Solve for x
    x = 1,337,299,761.60/44,604
  6. Step 6: Final answer
    x = 29,981.61

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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.