Home / 21,251.28-31,878.06-6,459.08

Finding the Fourth Proportional to 21,251.28, 31,878.06 and 6,459.08

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Solution

The fourth proportional to 21,251.28, 31,878.06 and 6,459.08 is: 9,688.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,251.28 : 31,878.06 = 6,459.08 : x
  2. Step 2: Convert to fraction form
    21,251.28/31,878.06 = 6,459.08/x
  3. Step 3: Cross multiply
    21,251.28x = 31,878.06 × 6,459.08
  4. Step 4: Simplify right side
    21,251.28x = 205,902,780.39
  5. Step 5: Solve for x
    x = 205,902,780.39/21,251.28
  6. Step 6: Final answer
    x = 9,688.96

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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.