Home / 21,868.60-32,787.09-8,530.30

Finding the Fourth Proportional to 21,868.60, 32,787.09 and 8,530.30

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Solution

The fourth proportional to 21,868.60, 32,787.09 and 8,530.30 is: 12,789.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,868.60 : 32,787.09 = 8,530.30 : x
  2. Step 2: Convert to fraction form
    21,868.60/32,787.09 = 8,530.30/x
  3. Step 3: Cross multiply
    21,868.60x = 32,787.09 × 8,530.30
  4. Step 4: Simplify right side
    21,868.60x = 279,683,713.83
  5. Step 5: Solve for x
    x = 279,683,713.83/21,868.60
  6. Step 6: Final answer
    x = 12,789.28

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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.