Home / 13,853.12-19,105.22-9,005.78

Finding the Fourth Proportional to 13,853.12, 19,105.22 and 9,005.78

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Solution

The fourth proportional to 13,853.12, 19,105.22 and 9,005.78 is: 12,420.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,853.12 : 19,105.22 = 9,005.78 : x
  2. Step 2: Convert to fraction form
    13,853.12/19,105.22 = 9,005.78/x
  3. Step 3: Cross multiply
    13,853.12x = 19,105.22 × 9,005.78
  4. Step 4: Simplify right side
    13,853.12x = 172,057,478.45
  5. Step 5: Solve for x
    x = 172,057,478.45/13,853.12
  6. Step 6: Final answer
    x = 12,420.13

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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.