Home / 8,711.36-12,019.80-5,175.76

Finding the Fourth Proportional to 8,711.36, 12,019.80 and 5,175.76

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Solution

The fourth proportional to 8,711.36, 12,019.80 and 5,175.76 is: 7,141.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,711.36 : 12,019.80 = 5,175.76 : x
  2. Step 2: Convert to fraction form
    8,711.36/12,019.80 = 5,175.76/x
  3. Step 3: Cross multiply
    8,711.36x = 12,019.80 × 5,175.76
  4. Step 4: Simplify right side
    8,711.36x = 62,211,600.05
  5. Step 5: Solve for x
    x = 62,211,600.05/8,711.36
  6. Step 6: Final answer
    x = 7,141.43

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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.