Home / 28,915.70-43,373.55-8,139.20

Finding the Fourth Proportional to 28,915.70, 43,373.55 and 8,139.20

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Solution

The fourth proportional to 28,915.70, 43,373.55 and 8,139.20 is: 12,208.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,915.70 : 43,373.55 = 8,139.20 : x
  2. Step 2: Convert to fraction form
    28,915.70/43,373.55 = 8,139.20/x
  3. Step 3: Cross multiply
    28,915.70x = 43,373.55 × 8,139.20
  4. Step 4: Simplify right side
    28,915.70x = 353,025,781.29
  5. Step 5: Solve for x
    x = 353,025,781.29/28,915.70
  6. Step 6: Final answer
    x = 12,208.79

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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.