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Finding the Fourth Proportional to 6,987.04, 9,641.76 and 4,002.72

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Solution

The fourth proportional to 6,987.04, 9,641.76 and 4,002.72 is: 5,523.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,987.04 : 9,641.76 = 4,002.72 : x
  2. Step 2: Convert to fraction form
    6,987.04/9,641.76 = 4,002.72/x
  3. Step 3: Cross multiply
    6,987.04x = 9,641.76 × 4,002.72
  4. Step 4: Simplify right side
    6,987.04x = 38,593,265.59
  5. Step 5: Solve for x
    x = 38,593,265.59/6,987.04
  6. Step 6: Final answer
    x = 5,523.55

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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.