Home / 21,065.38-31,579.56-8,595.91

Finding the Fourth Proportional to 21,065.38, 31,579.56 and 8,595.91

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Solution

The fourth proportional to 21,065.38, 31,579.56 and 8,595.91 is: 12,886.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,065.38 : 31,579.56 = 8,595.91 : x
  2. Step 2: Convert to fraction form
    21,065.38/31,579.56 = 8,595.91/x
  3. Step 3: Cross multiply
    21,065.38x = 31,579.56 × 8,595.91
  4. Step 4: Simplify right side
    21,065.38x = 271,454,897.70
  5. Step 5: Solve for x
    x = 271,454,897.70/21,065.38
  6. Step 6: Final answer
    x = 12,886.30

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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.