Home / 18,139.12-27,209.70-4,991.20

Finding the Fourth Proportional to 18,139.12, 27,209.70 and 4,991.20

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Solution

The fourth proportional to 18,139.12, 27,209.70 and 4,991.20 is: 7,487.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,139.12 : 27,209.70 = 4,991.20 : x
  2. Step 2: Convert to fraction form
    18,139.12/27,209.70 = 4,991.20/x
  3. Step 3: Cross multiply
    18,139.12x = 27,209.70 × 4,991.20
  4. Step 4: Simplify right side
    18,139.12x = 135,809,054.64
  5. Step 5: Solve for x
    x = 135,809,054.64/18,139.12
  6. Step 6: Final answer
    x = 7,487.08

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.