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Finding the Fourth Proportional to 9,117.68, 13,689.48 and 8,700.08

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Solution

The fourth proportional to 9,117.68, 13,689.48 and 8,700.08 is: 13,062.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,117.68 : 13,689.48 = 8,700.08 : x
  2. Step 2: Convert to fraction form
    9,117.68/13,689.48 = 8,700.08/x
  3. Step 3: Cross multiply
    9,117.68x = 13,689.48 × 8,700.08
  4. Step 4: Simplify right side
    9,117.68x = 119,099,571.16
  5. Step 5: Solve for x
    x = 119,099,571.16/9,117.68
  6. Step 6: Final answer
    x = 13,062.49

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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.