Home / 12,982.80-17,916.76-7,319.80

Finding the Fourth Proportional to 12,982.80, 17,916.76 and 7,319.80

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Solution

The fourth proportional to 12,982.80, 17,916.76 and 7,319.80 is: 10,101.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,982.80 : 17,916.76 = 7,319.80 : x
  2. Step 2: Convert to fraction form
    12,982.80/17,916.76 = 7,319.80/x
  3. Step 3: Cross multiply
    12,982.80x = 17,916.76 × 7,319.80
  4. Step 4: Simplify right side
    12,982.80x = 131,147,099.85
  5. Step 5: Solve for x
    x = 131,147,099.85/12,982.80
  6. Step 6: Final answer
    x = 10,101.60

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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.