Home / 11,118.74-15,343.90-7,139.88

Finding the Fourth Proportional to 11,118.74, 15,343.90 and 7,139.88

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Solution

The fourth proportional to 11,118.74, 15,343.90 and 7,139.88 is: 9,853.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,118.74 : 15,343.90 = 7,139.88 : x
  2. Step 2: Convert to fraction form
    11,118.74/15,343.90 = 7,139.88/x
  3. Step 3: Cross multiply
    11,118.74x = 15,343.90 × 7,139.88
  4. Step 4: Simplify right side
    11,118.74x = 109,553,586.88
  5. Step 5: Solve for x
    x = 109,553,586.88/11,118.74
  6. Step 6: Final answer
    x = 9,853.06

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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.