Home / 18,231.28-25,147.74-11,145.40

Finding the Fourth Proportional to 18,231.28, 25,147.74 and 11,145.40

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Solution

The fourth proportional to 18,231.28, 25,147.74 and 11,145.40 is: 15,373.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,231.28 : 25,147.74 = 11,145.40 : x
  2. Step 2: Convert to fraction form
    18,231.28/25,147.74 = 11,145.40/x
  3. Step 3: Cross multiply
    18,231.28x = 25,147.74 × 11,145.40
  4. Step 4: Simplify right side
    18,231.28x = 280,281,621.40
  5. Step 5: Solve for x
    x = 280,281,621.40/18,231.28
  6. Step 6: Final answer
    x = 15,373.67

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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.