Home / 11,139.59-15,370.53-6,891.14

Finding the Fourth Proportional to 11,139.59, 15,370.53 and 6,891.14

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Solution

The fourth proportional to 11,139.59, 15,370.53 and 6,891.14 is: 9,508.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,139.59 : 15,370.53 = 6,891.14 : x
  2. Step 2: Convert to fraction form
    11,139.59/15,370.53 = 6,891.14/x
  3. Step 3: Cross multiply
    11,139.59x = 15,370.53 × 6,891.14
  4. Step 4: Simplify right side
    11,139.59x = 105,920,486.69
  5. Step 5: Solve for x
    x = 105,920,486.69/11,139.59
  6. Step 6: Final answer
    x = 9,508.47

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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.