Home / 42,421.80-63,535.79-20,250.78

Finding the Fourth Proportional to 42,421.80, 63,535.79 and 20,250.78

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Solution

The fourth proportional to 42,421.80, 63,535.79 and 20,250.78 is: 30,329.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,421.80 : 63,535.79 = 20,250.78 : x
  2. Step 2: Convert to fraction form
    42,421.80/63,535.79 = 20,250.78/x
  3. Step 3: Cross multiply
    42,421.80x = 63,535.79 × 20,250.78
  4. Step 4: Simplify right side
    42,421.80x = 1,286,649,305.42
  5. Step 5: Solve for x
    x = 1,286,649,305.42/42,421.80
  6. Step 6: Final answer
    x = 30,329.91

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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.