Home / 20,335.20-30,502.80-7,187.55

Finding the Fourth Proportional to 20,335.20, 30,502.80 and 7,187.55

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Solution

The fourth proportional to 20,335.20, 30,502.80 and 7,187.55 is: 10,781.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,335.20 : 30,502.80 = 7,187.55 : x
  2. Step 2: Convert to fraction form
    20,335.20/30,502.80 = 7,187.55/x
  3. Step 3: Cross multiply
    20,335.20x = 30,502.80 × 7,187.55
  4. Step 4: Simplify right side
    20,335.20x = 219,240,400.14
  5. Step 5: Solve for x
    x = 219,240,400.14/20,335.20
  6. Step 6: Final answer
    x = 10,781.33

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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.