Home / 20,854.59-28,778.22-11,421.33

Finding the Fourth Proportional to 20,854.59, 28,778.22 and 11,421.33

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Solution

The fourth proportional to 20,854.59, 28,778.22 and 11,421.33 is: 15,760.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,854.59 : 28,778.22 = 11,421.33 : x
  2. Step 2: Convert to fraction form
    20,854.59/28,778.22 = 11,421.33/x
  3. Step 3: Cross multiply
    20,854.59x = 28,778.22 × 11,421.33
  4. Step 4: Simplify right side
    20,854.59x = 328,685,547.43
  5. Step 5: Solve for x
    x = 328,685,547.43/20,854.59
  6. Step 6: Final answer
    x = 15,760.83

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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.