Home / 13,387.19-18,474.20-7,418.70

Finding the Fourth Proportional to 13,387.19, 18,474.20 and 7,418.70

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Solution

The fourth proportional to 13,387.19, 18,474.20 and 7,418.70 is: 10,237.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,387.19 : 18,474.20 = 7,418.70 : x
  2. Step 2: Convert to fraction form
    13,387.19/18,474.20 = 7,418.70/x
  3. Step 3: Cross multiply
    13,387.19x = 18,474.20 × 7,418.70
  4. Step 4: Simplify right side
    13,387.19x = 137,054,556.63
  5. Step 5: Solve for x
    x = 137,054,556.63/13,387.19
  6. Step 6: Final answer
    x = 10,237.74

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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.