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Finding the Fourth Proportional to 44,685.78, 66,996.21 and 20,981.13

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Solution

The fourth proportional to 44,685.78, 66,996.21 and 20,981.13 is: 31,456.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    44,685.78 : 66,996.21 = 20,981.13 : x
  2. Step 2: Convert to fraction form
    44,685.78/66,996.21 = 20,981.13/x
  3. Step 3: Cross multiply
    44,685.78x = 66,996.21 × 20,981.13
  4. Step 4: Simplify right side
    44,685.78x = 1,405,656,018.96
  5. Step 5: Solve for x
    x = 1,405,656,018.96/44,685.78
  6. Step 6: Final answer
    x = 31,456.45

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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.