Home / 20,854.76-28,779.55-11,423.34

Finding the Fourth Proportional to 20,854.76, 28,779.55 and 11,423.34

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Solution

The fourth proportional to 20,854.76, 28,779.55 and 11,423.34 is: 15,764.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,854.76 : 28,779.55 = 11,423.34 : x
  2. Step 2: Convert to fraction form
    20,854.76/28,779.55 = 11,423.34/x
  3. Step 3: Cross multiply
    20,854.76x = 28,779.55 × 11,423.34
  4. Step 4: Simplify right side
    20,854.76x = 328,758,584.70
  5. Step 5: Solve for x
    x = 328,758,584.70/20,854.76
  6. Step 6: Final answer
    x = 15,764.20

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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.