Home / 20,854.38-28,779.47-11,422.95

Finding the Fourth Proportional to 20,854.38, 28,779.47 and 11,422.95

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Solution

The fourth proportional to 20,854.38, 28,779.47 and 11,422.95 is: 15,763.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,854.38 : 28,779.47 = 11,422.95 : x
  2. Step 2: Convert to fraction form
    20,854.38/28,779.47 = 11,422.95/x
  3. Step 3: Cross multiply
    20,854.38x = 28,779.47 × 11,422.95
  4. Step 4: Simplify right side
    20,854.38x = 328,746,389.72
  5. Step 5: Solve for x
    x = 328,746,389.72/20,854.38
  6. Step 6: Final answer
    x = 15,763.90

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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.