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Finding the Fourth Proportional to 6,885.76, 10,323.12 and 2,987.44

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Solution

The fourth proportional to 6,885.76, 10,323.12 and 2,987.44 is: 4,478.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,885.76 : 10,323.12 = 2,987.44 : x
  2. Step 2: Convert to fraction form
    6,885.76/10,323.12 = 2,987.44/x
  3. Step 3: Cross multiply
    6,885.76x = 10,323.12 × 2,987.44
  4. Step 4: Simplify right side
    6,885.76x = 30,839,701.61
  5. Step 5: Solve for x
    x = 30,839,701.61/6,885.76
  6. Step 6: Final answer
    x = 4,478.77

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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.