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Finding the Fourth Proportional to 15,990.40, 23,982.88 and 7,223.28

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Solution

The fourth proportional to 15,990.40, 23,982.88 and 7,223.28 is: 10,833.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,990.40 : 23,982.88 = 7,223.28 : x
  2. Step 2: Convert to fraction form
    15,990.40/23,982.88 = 7,223.28/x
  3. Step 3: Cross multiply
    15,990.40x = 23,982.88 × 7,223.28
  4. Step 4: Simplify right side
    15,990.40x = 173,235,057.45
  5. Step 5: Solve for x
    x = 173,235,057.45/15,990.40
  6. Step 6: Final answer
    x = 10,833.69

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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.