Home / 28,110.62-42,167.28-8,390.72

Finding the Fourth Proportional to 28,110.62, 42,167.28 and 8,390.72

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Solution

The fourth proportional to 28,110.62, 42,167.28 and 8,390.72 is: 12,586.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,110.62 : 42,167.28 = 8,390.72 : x
  2. Step 2: Convert to fraction form
    28,110.62/42,167.28 = 8,390.72/x
  3. Step 3: Cross multiply
    28,110.62x = 42,167.28 × 8,390.72
  4. Step 4: Simplify right side
    28,110.62x = 353,813,839.64
  5. Step 5: Solve for x
    x = 353,813,839.64/28,110.62
  6. Step 6: Final answer
    x = 12,586.48

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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.