Home / 13,220.11-18,246.92-8,978.24

Finding the Fourth Proportional to 13,220.11, 18,246.92 and 8,978.24

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Solution

The fourth proportional to 13,220.11, 18,246.92 and 8,978.24 is: 12,392.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,220.11 : 18,246.92 = 8,978.24 : x
  2. Step 2: Convert to fraction form
    13,220.11/18,246.92 = 8,978.24/x
  3. Step 3: Cross multiply
    13,220.11x = 18,246.92 × 8,978.24
  4. Step 4: Simplify right side
    13,220.11x = 163,825,135.79
  5. Step 5: Solve for x
    x = 163,825,135.79/13,220.11
  6. Step 6: Final answer
    x = 12,392.12

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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.