Home / 20,929.82-31,387-6,885.76

Finding the Fourth Proportional to 20,929.82, 31,387 and 6,885.76

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Solution

The fourth proportional to 20,929.82, 31,387 and 6,885.76 is: 10,326.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,929.82 : 31,387 = 6,885.76 : x
  2. Step 2: Convert to fraction form
    20,929.82/31,387 = 6,885.76/x
  3. Step 3: Cross multiply
    20,929.82x = 31,387 × 6,885.76
  4. Step 4: Simplify right side
    20,929.82x = 216,123,349.12
  5. Step 5: Solve for x
    x = 216,123,349.12/20,929.82
  6. Step 6: Final answer
    x = 10,326.10

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1.5x scale

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.