Home / 21,273.64-31,915.08-8,129.76

Finding the Fourth Proportional to 21,273.64, 31,915.08 and 8,129.76

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Solution

The fourth proportional to 21,273.64, 31,915.08 and 8,129.76 is: 12,196.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,273.64 : 31,915.08 = 8,129.76 : x
  2. Step 2: Convert to fraction form
    21,273.64/31,915.08 = 8,129.76/x
  3. Step 3: Cross multiply
    21,273.64x = 31,915.08 × 8,129.76
  4. Step 4: Simplify right side
    21,273.64x = 259,461,940.78
  5. Step 5: Solve for x
    x = 259,461,940.78/21,273.64
  6. Step 6: Final answer
    x = 12,196.41

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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.