Home / 12,539.20-18,808.96-8,642.56

Finding the Fourth Proportional to 12,539.20, 18,808.96 and 8,642.56

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Solution

The fourth proportional to 12,539.20, 18,808.96 and 8,642.56 is: 12,963.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,539.20 : 18,808.96 = 8,642.56 : x
  2. Step 2: Convert to fraction form
    12,539.20/18,808.96 = 8,642.56/x
  3. Step 3: Cross multiply
    12,539.20x = 18,808.96 × 8,642.56
  4. Step 4: Simplify right side
    12,539.20x = 162,557,565.34
  5. Step 5: Solve for x
    x = 162,557,565.34/12,539.20
  6. Step 6: Final answer
    x = 12,963.95

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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.