Home / 21,069.78-31,595.88-8,581.30

Finding the Fourth Proportional to 21,069.78, 31,595.88 and 8,581.30

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Solution

The fourth proportional to 21,069.78, 31,595.88 and 8,581.30 is: 12,868.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,069.78 : 31,595.88 = 8,581.30 : x
  2. Step 2: Convert to fraction form
    21,069.78/31,595.88 = 8,581.30/x
  3. Step 3: Cross multiply
    21,069.78x = 31,595.88 × 8,581.30
  4. Step 4: Simplify right side
    21,069.78x = 271,133,725.04
  5. Step 5: Solve for x
    x = 271,133,725.04/21,069.78
  6. Step 6: Final answer
    x = 12,868.37

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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.