Home / 13,019.12-17,975.30-8,309.78

Finding the Fourth Proportional to 13,019.12, 17,975.30 and 8,309.78

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Solution

The fourth proportional to 13,019.12, 17,975.30 and 8,309.78 is: 11,473.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,019.12 : 17,975.30 = 8,309.78 : x
  2. Step 2: Convert to fraction form
    13,019.12/17,975.30 = 8,309.78/x
  3. Step 3: Cross multiply
    13,019.12x = 17,975.30 × 8,309.78
  4. Step 4: Simplify right side
    13,019.12x = 149,370,657.01
  5. Step 5: Solve for x
    x = 149,370,657.01/13,019.12
  6. Step 6: Final answer
    x = 11,473.18

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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.