Home / 13,158.47-18,158.29-7,190.13

Finding the Fourth Proportional to 13,158.47, 18,158.29 and 7,190.13

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Solution

The fourth proportional to 13,158.47, 18,158.29 and 7,190.13 is: 9,922.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,158.47 : 18,158.29 = 7,190.13 : x
  2. Step 2: Convert to fraction form
    13,158.47/18,158.29 = 7,190.13/x
  3. Step 3: Cross multiply
    13,158.47x = 18,158.29 × 7,190.13
  4. Step 4: Simplify right side
    13,158.47x = 130,560,515.80
  5. Step 5: Solve for x
    x = 130,560,515.80/13,158.47
  6. Step 6: Final answer
    x = 9,922.16

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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.