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Finding the Fourth Proportional to 84,686.31, 127,029.51 and 21,511.17

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Solution

The fourth proportional to 84,686.31, 127,029.51 and 21,511.17 is: 32,266.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,686.31 : 127,029.51 = 21,511.17 : x
  2. Step 2: Convert to fraction form
    84,686.31/127,029.51 = 21,511.17/x
  3. Step 3: Cross multiply
    84,686.31x = 127,029.51 × 21,511.17
  4. Step 4: Simplify right side
    84,686.31x = 2,732,553,384.63
  5. Step 5: Solve for x
    x = 2,732,553,384.63/84,686.31
  6. Step 6: Final answer
    x = 32,266.77

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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.