Home / 40,986.30-61,479.45-28,520.40

Finding the Fourth Proportional to 40,986.30, 61,479.45 and 28,520.40

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Solution

The fourth proportional to 40,986.30, 61,479.45 and 28,520.40 is: 42,780.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,986.30 : 61,479.45 = 28,520.40 : x
  2. Step 2: Convert to fraction form
    40,986.30/61,479.45 = 28,520.40/x
  3. Step 3: Cross multiply
    40,986.30x = 61,479.45 × 28,520.40
  4. Step 4: Simplify right side
    40,986.30x = 1,753,418,505.78
  5. Step 5: Solve for x
    x = 1,753,418,505.78/40,986.30
  6. Step 6: Final answer
    x = 42,780.60

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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.