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Finding the Fourth Proportional to 28,499.15, 42,748.73 and 7,439.13

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Solution

The fourth proportional to 28,499.15, 42,748.73 and 7,439.13 is: 11,158.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,499.15 : 42,748.73 = 7,439.13 : x
  2. Step 2: Convert to fraction form
    28,499.15/42,748.73 = 7,439.13/x
  3. Step 3: Cross multiply
    28,499.15x = 42,748.73 × 7,439.13
  4. Step 4: Simplify right side
    28,499.15x = 318,013,378.40
  5. Step 5: Solve for x
    x = 318,013,378.40/28,499.15
  6. Step 6: Final answer
    x = 11,158.70

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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.