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Finding the Fourth Proportional to 6,148.80, 9,221.22 and 1,987.92

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Solution

The fourth proportional to 6,148.80, 9,221.22 and 1,987.92 is: 2,981.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,148.80 : 9,221.22 = 1,987.92 : x
  2. Step 2: Convert to fraction form
    6,148.80/9,221.22 = 1,987.92/x
  3. Step 3: Cross multiply
    6,148.80x = 9,221.22 × 1,987.92
  4. Step 4: Simplify right side
    6,148.80x = 18,331,047.66
  5. Step 5: Solve for x
    x = 18,331,047.66/6,148.80
  6. Step 6: Final answer
    x = 2,981.24

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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.