Home / 13,346.80-18,418.40-7,378.56

Finding the Fourth Proportional to 13,346.80, 18,418.40 and 7,378.56

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Solution

The fourth proportional to 13,346.80, 18,418.40 and 7,378.56 is: 10,182.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,346.80 : 18,418.40 = 7,378.56 : x
  2. Step 2: Convert to fraction form
    13,346.80/18,418.40 = 7,378.56/x
  3. Step 3: Cross multiply
    13,346.80x = 18,418.40 × 7,378.56
  4. Step 4: Simplify right side
    13,346.80x = 135,901,269.50
  5. Step 5: Solve for x
    x = 135,901,269.50/13,346.80
  6. Step 6: Final answer
    x = 10,182.31

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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.