Home / 12,921.60-17,824.32-8,722.56

Finding the Fourth Proportional to 12,921.60, 17,824.32 and 8,722.56

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Solution

The fourth proportional to 12,921.60, 17,824.32 and 8,722.56 is: 12,032.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,921.60 : 17,824.32 = 8,722.56 : x
  2. Step 2: Convert to fraction form
    12,921.60/17,824.32 = 8,722.56/x
  3. Step 3: Cross multiply
    12,921.60x = 17,824.32 × 8,722.56
  4. Step 4: Simplify right side
    12,921.60x = 155,473,700.66
  5. Step 5: Solve for x
    x = 155,473,700.66/12,921.60
  6. Step 6: Final answer
    x = 12,032.08

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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.