Home / 13,438.49-18,545.21-7,388.84

Finding the Fourth Proportional to 13,438.49, 18,545.21 and 7,388.84

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Solution

The fourth proportional to 13,438.49, 18,545.21 and 7,388.84 is: 10,196.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,438.49 : 18,545.21 = 7,388.84 : x
  2. Step 2: Convert to fraction form
    13,438.49/18,545.21 = 7,388.84/x
  3. Step 3: Cross multiply
    13,438.49x = 18,545.21 × 7,388.84
  4. Step 4: Simplify right side
    13,438.49x = 137,027,515.20
  5. Step 5: Solve for x
    x = 137,027,515.20/13,438.49
  6. Step 6: Final answer
    x = 10,196.65

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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.