Home / 20,956.90-31,436.89-6,916.36

Finding the Fourth Proportional to 20,956.90, 31,436.89 and 6,916.36

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Solution

The fourth proportional to 20,956.90, 31,436.89 and 6,916.36 is: 10,375.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,956.90 : 31,436.89 = 6,916.36 : x
  2. Step 2: Convert to fraction form
    20,956.90/31,436.89 = 6,916.36/x
  3. Step 3: Cross multiply
    20,956.90x = 31,436.89 × 6,916.36
  4. Step 4: Simplify right side
    20,956.90x = 217,428,848.52
  5. Step 5: Solve for x
    x = 217,428,848.52/20,956.90
  6. Step 6: Final answer
    x = 10,375.05

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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.