Home / 10,489.24-15,722.84-5,284.20

Finding the Fourth Proportional to 10,489.24, 15,722.84 and 5,284.20

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Solution

The fourth proportional to 10,489.24, 15,722.84 and 5,284.20 is: 7,920.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,489.24 : 15,722.84 = 5,284.20 : x
  2. Step 2: Convert to fraction form
    10,489.24/15,722.84 = 5,284.20/x
  3. Step 3: Cross multiply
    10,489.24x = 15,722.84 × 5,284.20
  4. Step 4: Simplify right side
    10,489.24x = 83,082,631.13
  5. Step 5: Solve for x
    x = 83,082,631.13/10,489.24
  6. Step 6: Final answer
    x = 7,920.75

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.