Home / 13,521.72-18,660.60-7,553.28

Finding the Fourth Proportional to 13,521.72, 18,660.60 and 7,553.28

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Solution

The fourth proportional to 13,521.72, 18,660.60 and 7,553.28 is: 10,423.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,521.72 : 18,660.60 = 7,553.28 : x
  2. Step 2: Convert to fraction form
    13,521.72/18,660.60 = 7,553.28/x
  3. Step 3: Cross multiply
    13,521.72x = 18,660.60 × 7,553.28
  4. Step 4: Simplify right side
    13,521.72x = 140,948,736.77
  5. Step 5: Solve for x
    x = 140,948,736.77/13,521.72
  6. Step 6: Final answer
    x = 10,423.88

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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.