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Finding the Fourth Proportional to 84,686.56, 127,029.89 and 21,511.42

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Solution

The fourth proportional to 84,686.56, 127,029.89 and 21,511.42 is: 32,267.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,686.56 : 127,029.89 = 21,511.42 : x
  2. Step 2: Convert to fraction form
    84,686.56/127,029.89 = 21,511.42/x
  3. Step 3: Cross multiply
    84,686.56x = 127,029.89 × 21,511.42
  4. Step 4: Simplify right side
    84,686.56x = 2,732,593,316.34
  5. Step 5: Solve for x
    x = 2,732,593,316.34/84,686.56
  6. Step 6: Final answer
    x = 32,267.14

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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.