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Finding the Fourth Proportional to 9,687.12, 13,280.88 and 9,512.16

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Solution

The fourth proportional to 9,687.12, 13,280.88 and 9,512.16 is: 13,041.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,687.12 : 13,280.88 = 9,512.16 : x
  2. Step 2: Convert to fraction form
    9,687.12/13,280.88 = 9,512.16/x
  3. Step 3: Cross multiply
    9,687.12x = 13,280.88 × 9,512.16
  4. Step 4: Simplify right side
    9,687.12x = 126,329,855.50
  5. Step 5: Solve for x
    x = 126,329,855.50/9,687.12
  6. Step 6: Final answer
    x = 13,041.01

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.