Home / 13,521.91-18,660.28-7,553.81

Finding the Fourth Proportional to 13,521.91, 18,660.28 and 7,553.81

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Solution

The fourth proportional to 13,521.91, 18,660.28 and 7,553.81 is: 10,424.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,521.91 : 18,660.28 = 7,553.81 : x
  2. Step 2: Convert to fraction form
    13,521.91/18,660.28 = 7,553.81/x
  3. Step 3: Cross multiply
    13,521.91x = 18,660.28 × 7,553.81
  4. Step 4: Simplify right side
    13,521.91x = 140,956,209.67
  5. Step 5: Solve for x
    x = 140,956,209.67/13,521.91
  6. Step 6: Final answer
    x = 10,424.28

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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.