Home / 15,494.20-21,381.30-8,779.43

Finding the Fourth Proportional to 15,494.20, 21,381.30 and 8,779.43

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Solution

The fourth proportional to 15,494.20, 21,381.30 and 8,779.43 is: 12,115.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,494.20 : 21,381.30 = 8,779.43 : x
  2. Step 2: Convert to fraction form
    15,494.20/21,381.30 = 8,779.43/x
  3. Step 3: Cross multiply
    15,494.20x = 21,381.30 × 8,779.43
  4. Step 4: Simplify right side
    15,494.20x = 187,715,680.11
  5. Step 5: Solve for x
    x = 187,715,680.11/15,494.20
  6. Step 6: Final answer
    x = 12,115.22

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.