Home / 20,521.11-28,315.49-11,568.61

Finding the Fourth Proportional to 20,521.11, 28,315.49 and 11,568.61

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Solution

The fourth proportional to 20,521.11, 28,315.49 and 11,568.61 is: 15,962.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,521.11 : 28,315.49 = 11,568.61 : x
  2. Step 2: Convert to fraction form
    20,521.11/28,315.49 = 11,568.61/x
  3. Step 3: Cross multiply
    20,521.11x = 28,315.49 × 11,568.61
  4. Step 4: Simplify right side
    20,521.11x = 327,570,719.19
  5. Step 5: Solve for x
    x = 327,570,719.19/20,521.11
  6. Step 6: Final answer
    x = 15,962.63

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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.