Home / 19,118.30-28,679.22-7,432.40

Finding the Fourth Proportional to 19,118.30, 28,679.22 and 7,432.40

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Solution

The fourth proportional to 19,118.30, 28,679.22 and 7,432.40 is: 11,149.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,118.30 : 28,679.22 = 7,432.40 : x
  2. Step 2: Convert to fraction form
    19,118.30/28,679.22 = 7,432.40/x
  3. Step 3: Cross multiply
    19,118.30x = 28,679.22 × 7,432.40
  4. Step 4: Simplify right side
    19,118.30x = 213,155,434.73
  5. Step 5: Solve for x
    x = 213,155,434.73/19,118.30
  6. Step 6: Final answer
    x = 11,149.29

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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.