Home / 13,129.65-18,119.16-7,161.53

Finding the Fourth Proportional to 13,129.65, 18,119.16 and 7,161.53

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Solution

The fourth proportional to 13,129.65, 18,119.16 and 7,161.53 is: 9,883.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,129.65 : 18,119.16 = 7,161.53 : x
  2. Step 2: Convert to fraction form
    13,129.65/18,119.16 = 7,161.53/x
  3. Step 3: Cross multiply
    13,129.65x = 18,119.16 × 7,161.53
  4. Step 4: Simplify right side
    13,129.65x = 129,760,858.41
  5. Step 5: Solve for x
    x = 129,760,858.41/13,129.65
  6. Step 6: Final answer
    x = 9,883.04

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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.