Home / 8,919.18-12,318.95-7,132.86

Finding the Fourth Proportional to 8,919.18, 12,318.95 and 7,132.86

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Solution

The fourth proportional to 8,919.18, 12,318.95 and 7,132.86 is: 9,851.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,919.18 : 12,318.95 = 7,132.86 : x
  2. Step 2: Convert to fraction form
    8,919.18/12,318.95 = 7,132.86/x
  3. Step 3: Cross multiply
    8,919.18x = 12,318.95 × 7,132.86
  4. Step 4: Simplify right side
    8,919.18x = 87,869,363.53
  5. Step 5: Solve for x
    x = 87,869,363.53/8,919.18
  6. Step 6: Final answer
    x = 9,851.73

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.