Home / 10,287.45-15,428.66-7,195.05

Finding the Fourth Proportional to 10,287.45, 15,428.66 and 7,195.05

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Solution

The fourth proportional to 10,287.45, 15,428.66 and 7,195.05 is: 10,790.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,287.45 : 15,428.66 = 7,195.05 : x
  2. Step 2: Convert to fraction form
    10,287.45/15,428.66 = 7,195.05/x
  3. Step 3: Cross multiply
    10,287.45x = 15,428.66 × 7,195.05
  4. Step 4: Simplify right side
    10,287.45x = 111,009,944.16
  5. Step 5: Solve for x
    x = 111,009,944.16/10,287.45
  6. Step 6: Final answer
    x = 10,790.81

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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.