Home / 12,126.68-18,189.96-10,478.18

Finding the Fourth Proportional to 12,126.68, 18,189.96 and 10,478.18

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Solution

The fourth proportional to 12,126.68, 18,189.96 and 10,478.18 is: 15,717.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,126.68 : 18,189.96 = 10,478.18 : x
  2. Step 2: Convert to fraction form
    12,126.68/18,189.96 = 10,478.18/x
  3. Step 3: Cross multiply
    12,126.68x = 18,189.96 × 10,478.18
  4. Step 4: Simplify right side
    12,126.68x = 190,597,675.07
  5. Step 5: Solve for x
    x = 190,597,675.07/12,126.68
  6. Step 6: Final answer
    x = 15,717.22

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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.