Home / 13,458.20-18,572.76-7,408.68

Finding the Fourth Proportional to 13,458.20, 18,572.76 and 7,408.68

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Solution

The fourth proportional to 13,458.20, 18,572.76 and 7,408.68 is: 10,224.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,458.20 : 18,572.76 = 7,408.68 : x
  2. Step 2: Convert to fraction form
    13,458.20/18,572.76 = 7,408.68/x
  3. Step 3: Cross multiply
    13,458.20x = 18,572.76 × 7,408.68
  4. Step 4: Simplify right side
    13,458.20x = 137,599,635.56
  5. Step 5: Solve for x
    x = 137,599,635.56/13,458.20
  6. Step 6: Final answer
    x = 10,224.22

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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.