Home / 11,251.90-15,534.24-7,720.30

Finding the Fourth Proportional to 11,251.90, 15,534.24 and 7,720.30

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Solution

The fourth proportional to 11,251.90, 15,534.24 and 7,720.30 is: 10,658.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,251.90 : 15,534.24 = 7,720.30 : x
  2. Step 2: Convert to fraction form
    11,251.90/15,534.24 = 7,720.30/x
  3. Step 3: Cross multiply
    11,251.90x = 15,534.24 × 7,720.30
  4. Step 4: Simplify right side
    11,251.90x = 119,928,993.07
  5. Step 5: Solve for x
    x = 119,928,993.07/11,251.90
  6. Step 6: Final answer
    x = 10,658.55

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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.