Home / 8,920.55-12,311.57-5,143.65

Finding the Fourth Proportional to 8,920.55, 12,311.57 and 5,143.65

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Solution

The fourth proportional to 8,920.55, 12,311.57 and 5,143.65 is: 7,098.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,920.55 : 12,311.57 = 5,143.65 : x
  2. Step 2: Convert to fraction form
    8,920.55/12,311.57 = 5,143.65/x
  3. Step 3: Cross multiply
    8,920.55x = 12,311.57 × 5,143.65
  4. Step 4: Simplify right side
    8,920.55x = 63,326,373.72
  5. Step 5: Solve for x
    x = 63,326,373.72/8,920.55
  6. Step 6: Final answer
    x = 7,098.93

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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.