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Finding the Fourth Proportional to 21,995.60, 32,917.80 and 13,236.80

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Solution

The fourth proportional to 21,995.60, 32,917.80 and 13,236.80 is: 19,809.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,995.60 : 32,917.80 = 13,236.80 : x
  2. Step 2: Convert to fraction form
    21,995.60/32,917.80 = 13,236.80/x
  3. Step 3: Cross multiply
    21,995.60x = 32,917.80 × 13,236.80
  4. Step 4: Simplify right side
    21,995.60x = 435,726,335.04
  5. Step 5: Solve for x
    x = 435,726,335.04/21,995.60
  6. Step 6: Final answer
    x = 19,809.70

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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.