Home / 13,521.28-20,265.16-7,660.12

Finding the Fourth Proportional to 13,521.28, 20,265.16 and 7,660.12

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Solution

The fourth proportional to 13,521.28, 20,265.16 and 7,660.12 is: 11,480.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,521.28 : 20,265.16 = 7,660.12 : x
  2. Step 2: Convert to fraction form
    13,521.28/20,265.16 = 7,660.12/x
  3. Step 3: Cross multiply
    13,521.28x = 20,265.16 × 7,660.12
  4. Step 4: Simplify right side
    13,521.28x = 155,233,557.42
  5. Step 5: Solve for x
    x = 155,233,557.42/13,521.28
  6. Step 6: Final answer
    x = 11,480.69

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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.