Home / 20,521.42-28,319.61-11,568.94

Finding the Fourth Proportional to 20,521.42, 28,319.61 and 11,568.94

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Solution

The fourth proportional to 20,521.42, 28,319.61 and 11,568.94 is: 15,965.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,521.42 : 28,319.61 = 11,568.94 : x
  2. Step 2: Convert to fraction form
    20,521.42/28,319.61 = 11,568.94/x
  3. Step 3: Cross multiply
    20,521.42x = 28,319.61 × 11,568.94
  4. Step 4: Simplify right side
    20,521.42x = 327,627,868.91
  5. Step 5: Solve for x
    x = 327,627,868.91/20,521.42
  6. Step 6: Final answer
    x = 15,965.17

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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.