Home / 19,862.40-29,793.60-12,475.20

Finding the Fourth Proportional to 19,862.40, 29,793.60 and 12,475.20

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Solution

The fourth proportional to 19,862.40, 29,793.60 and 12,475.20 is: 18,712.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,862.40 : 29,793.60 = 12,475.20 : x
  2. Step 2: Convert to fraction form
    19,862.40/29,793.60 = 12,475.20/x
  3. Step 3: Cross multiply
    19,862.40x = 29,793.60 × 12,475.20
  4. Step 4: Simplify right side
    19,862.40x = 371,681,118.72
  5. Step 5: Solve for x
    x = 371,681,118.72/19,862.40
  6. Step 6: Final answer
    x = 18,712.80

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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.