Home / 15,364.15-21,204.09-9,399.78

Finding the Fourth Proportional to 15,364.15, 21,204.09 and 9,399.78

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Solution

The fourth proportional to 15,364.15, 21,204.09 and 9,399.78 is: 12,972.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,364.15 : 21,204.09 = 9,399.78 : x
  2. Step 2: Convert to fraction form
    15,364.15/21,204.09 = 9,399.78/x
  3. Step 3: Cross multiply
    15,364.15x = 21,204.09 × 9,399.78
  4. Step 4: Simplify right side
    15,364.15x = 199,313,781.10
  5. Step 5: Solve for x
    x = 199,313,781.10/15,364.15
  6. Step 6: Final answer
    x = 12,972.65

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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.