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Finding the Fourth Proportional to 18,777.28, 28,182.08 and 9,777.76

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Solution

The fourth proportional to 18,777.28, 28,182.08 and 9,777.76 is: 14,675.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,777.28 : 28,182.08 = 9,777.76 : x
  2. Step 2: Convert to fraction form
    18,777.28/28,182.08 = 9,777.76/x
  3. Step 3: Cross multiply
    18,777.28x = 28,182.08 × 9,777.76
  4. Step 4: Simplify right side
    18,777.28x = 275,557,614.54
  5. Step 5: Solve for x
    x = 275,557,614.54/18,777.28
  6. Step 6: Final answer
    x = 14,675.05

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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.