Home / 8,716.94-12,018.13-7,121.91

Finding the Fourth Proportional to 8,716.94, 12,018.13 and 7,121.91

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Solution

The fourth proportional to 8,716.94, 12,018.13 and 7,121.91 is: 9,819.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,716.94 : 12,018.13 = 7,121.91 : x
  2. Step 2: Convert to fraction form
    8,716.94/12,018.13 = 7,121.91/x
  3. Step 3: Cross multiply
    8,716.94x = 12,018.13 × 7,121.91
  4. Step 4: Simplify right side
    8,716.94x = 85,592,040.23
  5. Step 5: Solve for x
    x = 85,592,040.23/8,716.94
  6. Step 6: Final answer
    x = 9,819.05

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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.