Home / 13,158.78-18,158.91-7,190.32

Finding the Fourth Proportional to 13,158.78, 18,158.91 and 7,190.32

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Solution

The fourth proportional to 13,158.78, 18,158.91 and 7,190.32 is: 9,922.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,158.78 : 18,158.91 = 7,190.32 : x
  2. Step 2: Convert to fraction form
    13,158.78/18,158.91 = 7,190.32/x
  3. Step 3: Cross multiply
    13,158.78x = 18,158.91 × 7,190.32
  4. Step 4: Simplify right side
    13,158.78x = 130,568,373.75
  5. Step 5: Solve for x
    x = 130,568,373.75/13,158.78
  6. Step 6: Final answer
    x = 9,922.53

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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.