Home / 12,515.28-17,269.91-7,478.49

Finding the Fourth Proportional to 12,515.28, 17,269.91 and 7,478.49

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Solution

The fourth proportional to 12,515.28, 17,269.91 and 7,478.49 is: 10,319.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,515.28 : 17,269.91 = 7,478.49 : x
  2. Step 2: Convert to fraction form
    12,515.28/17,269.91 = 7,478.49/x
  3. Step 3: Cross multiply
    12,515.28x = 17,269.91 × 7,478.49
  4. Step 4: Simplify right side
    12,515.28x = 129,152,904.65
  5. Step 5: Solve for x
    x = 129,152,904.65/12,515.28
  6. Step 6: Final answer
    x = 10,319.62

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.