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Finding the Fourth Proportional to 10,356.80, 15,551.40 and 5,982.80

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Solution

The fourth proportional to 10,356.80, 15,551.40 and 5,982.80 is: 8,983.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,356.80 : 15,551.40 = 5,982.80 : x
  2. Step 2: Convert to fraction form
    10,356.80/15,551.40 = 5,982.80/x
  3. Step 3: Cross multiply
    10,356.80x = 15,551.40 × 5,982.80
  4. Step 4: Simplify right side
    10,356.80x = 93,040,915.92
  5. Step 5: Solve for x
    x = 93,040,915.92/10,356.80
  6. Step 6: Final answer
    x = 8,983.56

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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.