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Finding the Fourth Proportional to 28,040.70, 42,067.08 and 8,320.62

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Solution

The fourth proportional to 28,040.70, 42,067.08 and 8,320.62 is: 12,482.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,040.70 : 42,067.08 = 8,320.62 : x
  2. Step 2: Convert to fraction form
    28,040.70/42,067.08 = 8,320.62/x
  3. Step 3: Cross multiply
    28,040.70x = 42,067.08 × 8,320.62
  4. Step 4: Simplify right side
    28,040.70x = 350,024,187.19
  5. Step 5: Solve for x
    x = 350,024,187.19/28,040.70
  6. Step 6: Final answer
    x = 12,482.72

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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.