Home / 13,238.78-18,269.55-7,270.56

Finding the Fourth Proportional to 13,238.78, 18,269.55 and 7,270.56

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Solution

The fourth proportional to 13,238.78, 18,269.55 and 7,270.56 is: 10,033.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,238.78 : 18,269.55 = 7,270.56 : x
  2. Step 2: Convert to fraction form
    13,238.78/18,269.55 = 7,270.56/x
  3. Step 3: Cross multiply
    13,238.78x = 18,269.55 × 7,270.56
  4. Step 4: Simplify right side
    13,238.78x = 132,829,859.45
  5. Step 5: Solve for x
    x = 132,829,859.45/13,238.78
  6. Step 6: Final answer
    x = 10,033.40

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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.