Home / 20,951.14-31,431.35-6,915.51

Finding the Fourth Proportional to 20,951.14, 31,431.35 and 6,915.51

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Solution

The fourth proportional to 20,951.14, 31,431.35 and 6,915.51 is: 10,374.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,951.14 : 31,431.35 = 6,915.51 : x
  2. Step 2: Convert to fraction form
    20,951.14/31,431.35 = 6,915.51/x
  3. Step 3: Cross multiply
    20,951.14x = 31,431.35 × 6,915.51
  4. Step 4: Simplify right side
    20,951.14x = 217,363,815.24
  5. Step 5: Solve for x
    x = 217,363,815.24/20,951.14
  6. Step 6: Final answer
    x = 10,374.80

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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.