Home / 13,350.80-18,420.34-7,972.60

Finding the Fourth Proportional to 13,350.80, 18,420.34 and 7,972.60

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Solution

The fourth proportional to 13,350.80, 18,420.34 and 7,972.60 is: 10,999.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,350.80 : 18,420.34 = 7,972.60 : x
  2. Step 2: Convert to fraction form
    13,350.80/18,420.34 = 7,972.60/x
  3. Step 3: Cross multiply
    13,350.80x = 18,420.34 × 7,972.60
  4. Step 4: Simplify right side
    13,350.80x = 146,858,002.68
  5. Step 5: Solve for x
    x = 146,858,002.68/13,350.80
  6. Step 6: Final answer
    x = 10,999.94

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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.