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Finding the Fourth Proportional to 7,962.80, 10,987.72 and 4,425.52

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Solution

The fourth proportional to 7,962.80, 10,987.72 and 4,425.52 is: 6,106.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,962.80 : 10,987.72 = 4,425.52 : x
  2. Step 2: Convert to fraction form
    7,962.80/10,987.72 = 4,425.52/x
  3. Step 3: Cross multiply
    7,962.80x = 10,987.72 × 4,425.52
  4. Step 4: Simplify right side
    7,962.80x = 48,626,374.61
  5. Step 5: Solve for x
    x = 48,626,374.61/7,962.80
  6. Step 6: Final answer
    x = 6,106.69

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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.