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Finding the Fourth Proportional to 18,908.64, 28,346.76 and 7,230.06

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Solution

The fourth proportional to 18,908.64, 28,346.76 and 7,230.06 is: 10,838.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,908.64 : 28,346.76 = 7,230.06 : x
  2. Step 2: Convert to fraction form
    18,908.64/28,346.76 = 7,230.06/x
  3. Step 3: Cross multiply
    18,908.64x = 28,346.76 × 7,230.06
  4. Step 4: Simplify right side
    18,908.64x = 204,948,775.61
  5. Step 5: Solve for x
    x = 204,948,775.61/18,908.64
  6. Step 6: Final answer
    x = 10,838.90

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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.