Home / 13,387.54-18,474.94-7,419.28

Finding the Fourth Proportional to 13,387.54, 18,474.94 and 7,419.28

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Solution

The fourth proportional to 13,387.54, 18,474.94 and 7,419.28 is: 10,238.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,387.54 : 18,474.94 = 7,419.28 : x
  2. Step 2: Convert to fraction form
    13,387.54/18,474.94 = 7,419.28/x
  3. Step 3: Cross multiply
    13,387.54x = 18,474.94 × 7,419.28
  4. Step 4: Simplify right side
    13,387.54x = 137,070,752.84
  5. Step 5: Solve for x
    x = 137,070,752.84/13,387.54
  6. Step 6: Final answer
    x = 10,238.68

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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.