Home / 13,425.12-18,528.12-8,120.16

Finding the Fourth Proportional to 13,425.12, 18,528.12 and 8,120.16

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Solution

The fourth proportional to 13,425.12, 18,528.12 and 8,120.16 is: 11,206.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,425.12 : 18,528.12 = 8,120.16 : x
  2. Step 2: Convert to fraction form
    13,425.12/18,528.12 = 8,120.16/x
  3. Step 3: Cross multiply
    13,425.12x = 18,528.12 × 8,120.16
  4. Step 4: Simplify right side
    13,425.12x = 150,451,298.90
  5. Step 5: Solve for x
    x = 150,451,298.90/13,425.12
  6. Step 6: Final answer
    x = 11,206.70

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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.