Home / 21,264.53-31,886.10-12,382.74

Finding the Fourth Proportional to 21,264.53, 31,886.10 and 12,382.74

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Solution

The fourth proportional to 21,264.53, 31,886.10 and 12,382.74 is: 18,567.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,264.53 : 31,886.10 = 12,382.74 : x
  2. Step 2: Convert to fraction form
    21,264.53/31,886.10 = 12,382.74/x
  3. Step 3: Cross multiply
    21,264.53x = 31,886.10 × 12,382.74
  4. Step 4: Simplify right side
    21,264.53x = 394,837,285.91
  5. Step 5: Solve for x
    x = 394,837,285.91/21,264.53
  6. Step 6: Final answer
    x = 18,567.89

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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.