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Finding the Fourth Proportional to 28,499.65, 42,749.49 and 7,439.63

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Solution

The fourth proportional to 28,499.65, 42,749.49 and 7,439.63 is: 11,159.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,499.65 : 42,749.49 = 7,439.63 : x
  2. Step 2: Convert to fraction form
    28,499.65/42,749.49 = 7,439.63/x
  3. Step 3: Cross multiply
    28,499.65x = 42,749.49 × 7,439.63
  4. Step 4: Simplify right side
    28,499.65x = 318,040,351.09
  5. Step 5: Solve for x
    x = 318,040,351.09/28,499.65
  6. Step 6: Final answer
    x = 11,159.45

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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.