Home / 21,209.28-31,807.80-8,559.04

Finding the Fourth Proportional to 21,209.28, 31,807.80 and 8,559.04

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Solution

The fourth proportional to 21,209.28, 31,807.80 and 8,559.04 is: 12,836.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,209.28 : 31,807.80 = 8,559.04 : x
  2. Step 2: Convert to fraction form
    21,209.28/31,807.80 = 8,559.04/x
  3. Step 3: Cross multiply
    21,209.28x = 31,807.80 × 8,559.04
  4. Step 4: Simplify right side
    21,209.28x = 272,244,232.51
  5. Step 5: Solve for x
    x = 272,244,232.51/21,209.28
  6. Step 6: Final answer
    x = 12,836.09

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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.