Home / 21,965.92-32,938.80-8,807.20

Finding the Fourth Proportional to 21,965.92, 32,938.80 and 8,807.20

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Solution

The fourth proportional to 21,965.92, 32,938.80 and 8,807.20 is: 13,206.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,965.92 : 32,938.80 = 8,807.20 : x
  2. Step 2: Convert to fraction form
    21,965.92/32,938.80 = 8,807.20/x
  3. Step 3: Cross multiply
    21,965.92x = 32,938.80 × 8,807.20
  4. Step 4: Simplify right side
    21,965.92x = 290,098,599.36
  5. Step 5: Solve for x
    x = 290,098,599.36/21,965.92
  6. Step 6: Final answer
    x = 13,206.76

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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.