Home / 20,885.85-28,822.55-11,454.57

Finding the Fourth Proportional to 20,885.85, 28,822.55 and 11,454.57

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Solution

The fourth proportional to 20,885.85, 28,822.55 and 11,454.57 is: 15,807.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,885.85 : 28,822.55 = 11,454.57 : x
  2. Step 2: Convert to fraction form
    20,885.85/28,822.55 = 11,454.57/x
  3. Step 3: Cross multiply
    20,885.85x = 28,822.55 × 11,454.57
  4. Step 4: Simplify right side
    20,885.85x = 330,149,859.28
  5. Step 5: Solve for x
    x = 330,149,859.28/20,885.85
  6. Step 6: Final answer
    x = 15,807.35

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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.