Home / 15,515.64-21,407.94-8,799.72

Finding the Fourth Proportional to 15,515.64, 21,407.94 and 8,799.72

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Solution

The fourth proportional to 15,515.64, 21,407.94 and 8,799.72 is: 12,141.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,515.64 : 21,407.94 = 8,799.72 : x
  2. Step 2: Convert to fraction form
    15,515.64/21,407.94 = 8,799.72/x
  3. Step 3: Cross multiply
    15,515.64x = 21,407.94 × 8,799.72
  4. Step 4: Simplify right side
    15,515.64x = 188,383,877.78
  5. Step 5: Solve for x
    x = 188,383,877.78/15,515.64
  6. Step 6: Final answer
    x = 12,141.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.