Home / 42,400.60-63,600.90-12,815.35

Finding the Fourth Proportional to 42,400.60, 63,600.90 and 12,815.35

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Solution

The fourth proportional to 42,400.60, 63,600.90 and 12,815.35 is: 19,223.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,400.60 : 63,600.90 = 12,815.35 : x
  2. Step 2: Convert to fraction form
    42,400.60/63,600.90 = 12,815.35/x
  3. Step 3: Cross multiply
    42,400.60x = 63,600.90 × 12,815.35
  4. Step 4: Simplify right side
    42,400.60x = 815,067,793.82
  5. Step 5: Solve for x
    x = 815,067,793.82/42,400.60
  6. Step 6: Final answer
    x = 19,223.03

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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.