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Finding the Fourth Proportional to 7,958.47, 11,920.14 and 4,987.24

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Solution

The fourth proportional to 7,958.47, 11,920.14 and 4,987.24 is: 7,469.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,958.47 : 11,920.14 = 4,987.24 : x
  2. Step 2: Convert to fraction form
    7,958.47/11,920.14 = 4,987.24/x
  3. Step 3: Cross multiply
    7,958.47x = 11,920.14 × 4,987.24
  4. Step 4: Simplify right side
    7,958.47x = 59,448,599.01
  5. Step 5: Solve for x
    x = 59,448,599.01/7,958.47
  6. Step 6: Final answer
    x = 7,469.85

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1.5x scale

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.