Home / 12,110.80-18,155.40-7,175.20

Finding the Fourth Proportional to 12,110.80, 18,155.40 and 7,175.20

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Solution

The fourth proportional to 12,110.80, 18,155.40 and 7,175.20 is: 10,756.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,110.80 : 18,155.40 = 7,175.20 : x
  2. Step 2: Convert to fraction form
    12,110.80/18,155.40 = 7,175.20/x
  3. Step 3: Cross multiply
    12,110.80x = 18,155.40 × 7,175.20
  4. Step 4: Simplify right side
    12,110.80x = 130,268,626.08
  5. Step 5: Solve for x
    x = 130,268,626.08/12,110.80
  6. Step 6: Final answer
    x = 10,756.40

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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.