Home / 21,268.46-31,915.60-7,951.15

Finding the Fourth Proportional to 21,268.46, 31,915.60 and 7,951.15

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Solution

The fourth proportional to 21,268.46, 31,915.60 and 7,951.15 is: 11,931.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,268.46 : 31,915.60 = 7,951.15 : x
  2. Step 2: Convert to fraction form
    21,268.46/31,915.60 = 7,951.15/x
  3. Step 3: Cross multiply
    21,268.46x = 31,915.60 × 7,951.15
  4. Step 4: Simplify right side
    21,268.46x = 253,765,722.94
  5. Step 5: Solve for x
    x = 253,765,722.94/21,268.46
  6. Step 6: Final answer
    x = 11,931.55

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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.