Home / 13,420.20-18,519.60-7,451.52

Finding the Fourth Proportional to 13,420.20, 18,519.60 and 7,451.52

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Solution

The fourth proportional to 13,420.20, 18,519.60 and 7,451.52 is: 10,282.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,420.20 : 18,519.60 = 7,451.52 : x
  2. Step 2: Convert to fraction form
    13,420.20/18,519.60 = 7,451.52/x
  3. Step 3: Cross multiply
    13,420.20x = 18,519.60 × 7,451.52
  4. Step 4: Simplify right side
    13,420.20x = 137,999,169.79
  5. Step 5: Solve for x
    x = 137,999,169.79/13,420.20
  6. Step 6: Final answer
    x = 10,282.94

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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.