Home / 20,645.90-28,491.20-11,214.48

Finding the Fourth Proportional to 20,645.90, 28,491.20 and 11,214.48

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Solution

The fourth proportional to 20,645.90, 28,491.20 and 11,214.48 is: 15,475.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,645.90 : 28,491.20 = 11,214.48 : x
  2. Step 2: Convert to fraction form
    20,645.90/28,491.20 = 11,214.48/x
  3. Step 3: Cross multiply
    20,645.90x = 28,491.20 × 11,214.48
  4. Step 4: Simplify right side
    20,645.90x = 319,513,992.58
  5. Step 5: Solve for x
    x = 319,513,992.58/20,645.90
  6. Step 6: Final answer
    x = 15,475.91

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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.