Home / 20,854.34-28,779.36-11,422.29

Finding the Fourth Proportional to 20,854.34, 28,779.36 and 11,422.29

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Solution

The fourth proportional to 20,854.34, 28,779.36 and 11,422.29 is: 15,762.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,854.34 : 28,779.36 = 11,422.29 : x
  2. Step 2: Convert to fraction form
    20,854.34/28,779.36 = 11,422.29/x
  3. Step 3: Cross multiply
    20,854.34x = 28,779.36 × 11,422.29
  4. Step 4: Simplify right side
    20,854.34x = 328,726,195.93
  5. Step 5: Solve for x
    x = 328,726,195.93/20,854.34
  6. Step 6: Final answer
    x = 15,762.97

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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.