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Finding the Fourth Proportional to 15,179.16, 20,945.20 and 9,211.08

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Solution

The fourth proportional to 15,179.16, 20,945.20 and 9,211.08 is: 12,710.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,179.16 : 20,945.20 = 9,211.08 : x
  2. Step 2: Convert to fraction form
    15,179.16/20,945.20 = 9,211.08/x
  3. Step 3: Cross multiply
    15,179.16x = 20,945.20 × 9,211.08
  4. Step 4: Simplify right side
    15,179.16x = 192,927,912.82
  5. Step 5: Solve for x
    x = 192,927,912.82/15,179.16
  6. Step 6: Final answer
    x = 12,710.05

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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.