Home / 12,921.60-17,769.60-11,366.40

Finding the Fourth Proportional to 12,921.60, 17,769.60 and 11,366.40

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Solution

The fourth proportional to 12,921.60, 17,769.60 and 11,366.40 is: 15,630.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,921.60 : 17,769.60 = 11,366.40 : x
  2. Step 2: Convert to fraction form
    12,921.60/17,769.60 = 11,366.40/x
  3. Step 3: Cross multiply
    12,921.60x = 17,769.60 × 11,366.40
  4. Step 4: Simplify right side
    12,921.60x = 201,976,381.44
  5. Step 5: Solve for x
    x = 201,976,381.44/12,921.60
  6. Step 6: Final answer
    x = 15,630.91

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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.