Home / 13,212.48-18,249.18-9,621.69

Finding the Fourth Proportional to 13,212.48, 18,249.18 and 9,621.69

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Solution

The fourth proportional to 13,212.48, 18,249.18 and 9,621.69 is: 13,289.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,212.48 : 18,249.18 = 9,621.69 : x
  2. Step 2: Convert to fraction form
    13,212.48/18,249.18 = 9,621.69/x
  3. Step 3: Cross multiply
    13,212.48x = 18,249.18 × 9,621.69
  4. Step 4: Simplify right side
    13,212.48x = 175,587,952.71
  5. Step 5: Solve for x
    x = 175,587,952.71/13,212.48
  6. Step 6: Final answer
    x = 13,289.55

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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.