Home / 13,400.78-18,438.71-11,001.92

Finding the Fourth Proportional to 13,400.78, 18,438.71 and 11,001.92

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Solution

The fourth proportional to 13,400.78, 18,438.71 and 11,001.92 is: 15,138.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,400.78 : 18,438.71 = 11,001.92 : x
  2. Step 2: Convert to fraction form
    13,400.78/18,438.71 = 11,001.92/x
  3. Step 3: Cross multiply
    13,400.78x = 18,438.71 × 11,001.92
  4. Step 4: Simplify right side
    13,400.78x = 202,861,065.12
  5. Step 5: Solve for x
    x = 202,861,065.12/13,400.78
  6. Step 6: Final answer
    x = 15,138.01

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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.