Home / 21,877.20-32,815.80-20,917.35

Finding the Fourth Proportional to 21,877.20, 32,815.80 and 20,917.35

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Solution

The fourth proportional to 21,877.20, 32,815.80 and 20,917.35 is: 31,376.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,877.20 : 32,815.80 = 20,917.35 : x
  2. Step 2: Convert to fraction form
    21,877.20/32,815.80 = 20,917.35/x
  3. Step 3: Cross multiply
    21,877.20x = 32,815.80 × 20,917.35
  4. Step 4: Simplify right side
    21,877.20x = 686,419,574.13
  5. Step 5: Solve for x
    x = 686,419,574.13/21,877.20
  6. Step 6: Final answer
    x = 31,376.03

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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.