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Finding the Fourth Proportional to 18,908.88, 28,366.20 and 9,040.08

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Solution

The fourth proportional to 18,908.88, 28,366.20 and 9,040.08 is: 13,561.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,908.88 : 28,366.20 = 9,040.08 : x
  2. Step 2: Convert to fraction form
    18,908.88/28,366.20 = 9,040.08/x
  3. Step 3: Cross multiply
    18,908.88x = 28,366.20 × 9,040.08
  4. Step 4: Simplify right side
    18,908.88x = 256,432,717.30
  5. Step 5: Solve for x
    x = 256,432,717.30/18,908.88
  6. Step 6: Final answer
    x = 13,561.50

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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.