Home / 18,339.48-25,211.17-15,777.90

Finding the Fourth Proportional to 18,339.48, 25,211.17 and 15,777.90

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Solution

The fourth proportional to 18,339.48, 25,211.17 and 15,777.90 is: 21,689.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,339.48 : 25,211.17 = 15,777.90 : x
  2. Step 2: Convert to fraction form
    18,339.48/25,211.17 = 15,777.90/x
  3. Step 3: Cross multiply
    18,339.48x = 25,211.17 × 15,777.90
  4. Step 4: Simplify right side
    18,339.48x = 397,779,319.14
  5. Step 5: Solve for x
    x = 397,779,319.14/18,339.48
  6. Step 6: Final answer
    x = 21,689.78

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.