Home / 9,215.20-13,831.71-8,715.70

Finding the Fourth Proportional to 9,215.20, 13,831.71 and 8,715.70

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Solution

The fourth proportional to 9,215.20, 13,831.71 and 8,715.70 is: 13,081.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,215.20 : 13,831.71 = 8,715.70 : x
  2. Step 2: Convert to fraction form
    9,215.20/13,831.71 = 8,715.70/x
  3. Step 3: Cross multiply
    9,215.20x = 13,831.71 × 8,715.70
  4. Step 4: Simplify right side
    9,215.20x = 120,553,034.85
  5. Step 5: Solve for x
    x = 120,553,034.85/9,215.20
  6. Step 6: Final answer
    x = 13,081.98

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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.