Home / 15,426.78-21,288.97-8,713.84

Finding the Fourth Proportional to 15,426.78, 21,288.97 and 8,713.84

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Solution

The fourth proportional to 15,426.78, 21,288.97 and 8,713.84 is: 12,025.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,426.78 : 21,288.97 = 8,713.84 : x
  2. Step 2: Convert to fraction form
    15,426.78/21,288.97 = 8,713.84/x
  3. Step 3: Cross multiply
    15,426.78x = 21,288.97 × 8,713.84
  4. Step 4: Simplify right side
    15,426.78x = 185,508,634.78
  5. Step 5: Solve for x
    x = 185,508,634.78/15,426.78
  6. Step 6: Final answer
    x = 12,025.10

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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.