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Finding the Fourth Proportional to 28,499.85, 42,752.21 and 7,442.69

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Solution

The fourth proportional to 28,499.85, 42,752.21 and 7,442.69 is: 11,164.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,499.85 : 42,752.21 = 7,442.69 : x
  2. Step 2: Convert to fraction form
    28,499.85/42,752.21 = 7,442.69/x
  3. Step 3: Cross multiply
    28,499.85x = 42,752.21 × 7,442.69
  4. Step 4: Simplify right side
    28,499.85x = 318,191,194.87
  5. Step 5: Solve for x
    x = 318,191,194.87/28,499.85
  6. Step 6: Final answer
    x = 11,164.66

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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.