Home / 13,217.79-18,240.78-7,249.40

Finding the Fourth Proportional to 13,217.79, 18,240.78 and 7,249.40

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Solution

The fourth proportional to 13,217.79, 18,240.78 and 7,249.40 is: 10,004.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,217.79 : 18,240.78 = 7,249.40 : x
  2. Step 2: Convert to fraction form
    13,217.79/18,240.78 = 7,249.40/x
  3. Step 3: Cross multiply
    13,217.79x = 18,240.78 × 7,249.40
  4. Step 4: Simplify right side
    13,217.79x = 132,234,710.53
  5. Step 5: Solve for x
    x = 132,234,710.53/13,217.79
  6. Step 6: Final answer
    x = 10,004.30

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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.