Home / 13,438.11-18,544.81-7,388.61

Finding the Fourth Proportional to 13,438.11, 18,544.81 and 7,388.61

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Solution

The fourth proportional to 13,438.11, 18,544.81 and 7,388.61 is: 10,196.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,438.11 : 18,544.81 = 7,388.61 : x
  2. Step 2: Convert to fraction form
    13,438.11/18,544.81 = 7,388.61/x
  3. Step 3: Cross multiply
    13,438.11x = 18,544.81 × 7,388.61
  4. Step 4: Simplify right side
    13,438.11x = 137,020,308.31
  5. Step 5: Solve for x
    x = 137,020,308.31/13,438.11
  6. Step 6: Final answer
    x = 10,196.40

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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.