Home / 21,276.72-31,915.28-7,425.76

Finding the Fourth Proportional to 21,276.72, 31,915.28 and 7,425.76

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Solution

The fourth proportional to 21,276.72, 31,915.28 and 7,425.76 is: 11,138.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,276.72 : 31,915.28 = 7,425.76 : x
  2. Step 2: Convert to fraction form
    21,276.72/31,915.28 = 7,425.76/x
  3. Step 3: Cross multiply
    21,276.72x = 31,915.28 × 7,425.76
  4. Step 4: Simplify right side
    21,276.72x = 236,995,209.61
  5. Step 5: Solve for x
    x = 236,995,209.61/21,276.72
  6. Step 6: Final answer
    x = 11,138.71

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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.