Home / 20,885.56-28,821.82-11,454.08

Finding the Fourth Proportional to 20,885.56, 28,821.82 and 11,454.08

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Solution

The fourth proportional to 20,885.56, 28,821.82 and 11,454.08 is: 15,806.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,885.56 : 28,821.82 = 11,454.08 : x
  2. Step 2: Convert to fraction form
    20,885.56/28,821.82 = 11,454.08/x
  3. Step 3: Cross multiply
    20,885.56x = 28,821.82 × 11,454.08
  4. Step 4: Simplify right side
    20,885.56x = 330,127,432.03
  5. Step 5: Solve for x
    x = 330,127,432.03/20,885.56
  6. Step 6: Final answer
    x = 15,806.49

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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.