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Finding the Fourth Proportional to 55,011.78, 82,497.15 and 21,720.78

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Solution

The fourth proportional to 55,011.78, 82,497.15 and 21,720.78 is: 32,573.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,011.78 : 82,497.15 = 21,720.78 : x
  2. Step 2: Convert to fraction form
    55,011.78/82,497.15 = 21,720.78/x
  3. Step 3: Cross multiply
    55,011.78x = 82,497.15 × 21,720.78
  4. Step 4: Simplify right side
    55,011.78x = 1,791,902,445.78
  5. Step 5: Solve for x
    x = 1,791,902,445.78/55,011.78
  6. Step 6: Final answer
    x = 32,573.07

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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.