Home / 11,175.12-15,421.84-6,139.20

Finding the Fourth Proportional to 11,175.12, 15,421.84 and 6,139.20

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Solution

The fourth proportional to 11,175.12, 15,421.84 and 6,139.20 is: 8,472.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,175.12 : 15,421.84 = 6,139.20 : x
  2. Step 2: Convert to fraction form
    11,175.12/15,421.84 = 6,139.20/x
  3. Step 3: Cross multiply
    11,175.12x = 15,421.84 × 6,139.20
  4. Step 4: Simplify right side
    11,175.12x = 94,677,760.13
  5. Step 5: Solve for x
    x = 94,677,760.13/11,175.12
  6. Step 6: Final answer
    x = 8,472.19

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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.