Home / 20,885.66-28,822.14-11,454.20

Finding the Fourth Proportional to 20,885.66, 28,822.14 and 11,454.20

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Solution

The fourth proportional to 20,885.66, 28,822.14 and 11,454.20 is: 15,806.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,885.66 : 28,822.14 = 11,454.20 : x
  2. Step 2: Convert to fraction form
    20,885.66/28,822.14 = 11,454.20/x
  3. Step 3: Cross multiply
    20,885.66x = 28,822.14 × 11,454.20
  4. Step 4: Simplify right side
    20,885.66x = 330,134,411.88
  5. Step 5: Solve for x
    x = 330,134,411.88/20,885.66
  6. Step 6: Final answer
    x = 15,806.75

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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.