Home / 20,885.69-28,822.21-11,454.86

Finding the Fourth Proportional to 20,885.69, 28,822.21 and 11,454.86

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Solution

The fourth proportional to 20,885.69, 28,822.21 and 11,454.86 is: 15,807.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,885.69 : 28,822.21 = 11,454.86 : x
  2. Step 2: Convert to fraction form
    20,885.69/28,822.21 = 11,454.86/x
  3. Step 3: Cross multiply
    20,885.69x = 28,822.21 × 11,454.86
  4. Step 4: Simplify right side
    20,885.69x = 330,154,380.44
  5. Step 5: Solve for x
    x = 330,154,380.44/20,885.69
  6. Step 6: Final answer
    x = 15,807.68

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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.