Home / 10,145.39-15,216.90-2,749.40

Finding the Fourth Proportional to 10,145.39, 15,216.90 and 2,749.40

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Solution

The fourth proportional to 10,145.39, 15,216.90 and 2,749.40 is: 4,123.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,145.39 : 15,216.90 = 2,749.40 : x
  2. Step 2: Convert to fraction form
    10,145.39/15,216.90 = 2,749.40/x
  3. Step 3: Cross multiply
    10,145.39x = 15,216.90 × 2,749.40
  4. Step 4: Simplify right side
    10,145.39x = 41,837,344.86
  5. Step 5: Solve for x
    x = 41,837,344.86/10,145.39
  6. Step 6: Final answer
    x = 4,123.78

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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.