Home / 12,515.92-17,269.32-7,478.80

Finding the Fourth Proportional to 12,515.92, 17,269.32 and 7,478.80

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Solution

The fourth proportional to 12,515.92, 17,269.32 and 7,478.80 is: 10,319.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,515.92 : 17,269.32 = 7,478.80 : x
  2. Step 2: Convert to fraction form
    12,515.92/17,269.32 = 7,478.80/x
  3. Step 3: Cross multiply
    12,515.92x = 17,269.32 × 7,478.80
  4. Step 4: Simplify right side
    12,515.92x = 129,153,790.42
  5. Step 5: Solve for x
    x = 129,153,790.42/12,515.92
  6. Step 6: Final answer
    x = 10,319.16

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1.5x scale

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.