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Finding the Fourth Proportional to 9,380.16, 12,926.88 and 8,117.28

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Solution

The fourth proportional to 9,380.16, 12,926.88 and 8,117.28 is: 11,186.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,380.16 : 12,926.88 = 8,117.28 : x
  2. Step 2: Convert to fraction form
    9,380.16/12,926.88 = 8,117.28/x
  3. Step 3: Cross multiply
    9,380.16x = 12,926.88 × 8,117.28
  4. Step 4: Simplify right side
    9,380.16x = 104,931,104.49
  5. Step 5: Solve for x
    x = 104,931,104.49/9,380.16
  6. Step 6: Final answer
    x = 11,186.49

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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.