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Finding the Fourth Proportional to 21,879.70, 32,819.55 and 10,194.10

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Solution

The fourth proportional to 21,879.70, 32,819.55 and 10,194.10 is: 15,291.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,879.70 : 32,819.55 = 10,194.10 : x
  2. Step 2: Convert to fraction form
    21,879.70/32,819.55 = 10,194.10/x
  3. Step 3: Cross multiply
    21,879.70x = 32,819.55 × 10,194.10
  4. Step 4: Simplify right side
    21,879.70x = 334,565,774.66
  5. Step 5: Solve for x
    x = 334,565,774.66/21,879.70
  6. Step 6: Final answer
    x = 15,291.15

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.