Home / 20,948.22-28,909.71-11,518.74

Finding the Fourth Proportional to 20,948.22, 28,909.71 and 11,518.74

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Solution

The fourth proportional to 20,948.22, 28,909.71 and 11,518.74 is: 15,896.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,948.22 : 28,909.71 = 11,518.74 : x
  2. Step 2: Convert to fraction form
    20,948.22/28,909.71 = 11,518.74/x
  3. Step 3: Cross multiply
    20,948.22x = 28,909.71 × 11,518.74
  4. Step 4: Simplify right side
    20,948.22x = 333,003,432.97
  5. Step 5: Solve for x
    x = 333,003,432.97/20,948.22
  6. Step 6: Final answer
    x = 15,896.50

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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.