Home / 13,780.08-18,989.10-9,581.04

Finding the Fourth Proportional to 13,780.08, 18,989.10 and 9,581.04

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Solution

The fourth proportional to 13,780.08, 18,989.10 and 9,581.04 is: 13,202.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,780.08 : 18,989.10 = 9,581.04 : x
  2. Step 2: Convert to fraction form
    13,780.08/18,989.10 = 9,581.04/x
  3. Step 3: Cross multiply
    13,780.08x = 18,989.10 × 9,581.04
  4. Step 4: Simplify right side
    13,780.08x = 181,935,326.66
  5. Step 5: Solve for x
    x = 181,935,326.66/13,780.08
  6. Step 6: Final answer
    x = 13,202.78

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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.