Home / 21,046.52-31,560-12,283.88

Finding the Fourth Proportional to 21,046.52, 31,560 and 12,283.88

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Solution

The fourth proportional to 21,046.52, 31,560 and 12,283.88 is: 18,420.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,046.52 : 31,560 = 12,283.88 : x
  2. Step 2: Convert to fraction form
    21,046.52/31,560 = 12,283.88/x
  3. Step 3: Cross multiply
    21,046.52x = 31,560 × 12,283.88
  4. Step 4: Simplify right side
    21,046.52x = 387,679,252.80
  5. Step 5: Solve for x
    x = 387,679,252.80/21,046.52
  6. Step 6: Final answer
    x = 18,420.11

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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.