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Finding the Fourth Proportional to 28,315.44, 42,474.12 and 7,538.96

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Solution

The fourth proportional to 28,315.44, 42,474.12 and 7,538.96 is: 11,308.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,315.44 : 42,474.12 = 7,538.96 : x
  2. Step 2: Convert to fraction form
    28,315.44/42,474.12 = 7,538.96/x
  3. Step 3: Cross multiply
    28,315.44x = 42,474.12 × 7,538.96
  4. Step 4: Simplify right side
    28,315.44x = 320,210,691.72
  5. Step 5: Solve for x
    x = 320,210,691.72/28,315.44
  6. Step 6: Final answer
    x = 11,308.70

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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.