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Finding the Fourth Proportional to 9,170.76, 12,655.02 and 5,191.63

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Solution

The fourth proportional to 9,170.76, 12,655.02 and 5,191.63 is: 7,164.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,170.76 : 12,655.02 = 5,191.63 : x
  2. Step 2: Convert to fraction form
    9,170.76/12,655.02 = 5,191.63/x
  3. Step 3: Cross multiply
    9,170.76x = 12,655.02 × 5,191.63
  4. Step 4: Simplify right side
    9,170.76x = 65,700,155.52
  5. Step 5: Solve for x
    x = 65,700,155.52/9,170.76
  6. Step 6: Final answer
    x = 7,164.09

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Half scale
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Double scale
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Similar ratio
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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.