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Finding the Fourth Proportional to 8,839.53, 12,185.99 and 7,031.15

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Solution

The fourth proportional to 8,839.53, 12,185.99 and 7,031.15 is: 9,693.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,839.53 : 12,185.99 = 7,031.15 : x
  2. Step 2: Convert to fraction form
    8,839.53/12,185.99 = 7,031.15/x
  3. Step 3: Cross multiply
    8,839.53x = 12,185.99 × 7,031.15
  4. Step 4: Simplify right side
    8,839.53x = 85,681,554.05
  5. Step 5: Solve for x
    x = 85,681,554.05/8,839.53
  6. Step 6: Final answer
    x = 9,693.00

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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.