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Finding the Fourth Proportional to 9,182.95, 12,672.48 and 4,991.20

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Solution

The fourth proportional to 9,182.95, 12,672.48 and 4,991.20 is: 6,887.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,182.95 : 12,672.48 = 4,991.20 : x
  2. Step 2: Convert to fraction form
    9,182.95/12,672.48 = 4,991.20/x
  3. Step 3: Cross multiply
    9,182.95x = 12,672.48 × 4,991.20
  4. Step 4: Simplify right side
    9,182.95x = 63,250,882.18
  5. Step 5: Solve for x
    x = 63,250,882.18/9,182.95
  6. Step 6: Final answer
    x = 6,887.86

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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.