Home / 13,440.39-20,161.04-6,421.20

Finding the Fourth Proportional to 13,440.39, 20,161.04 and 6,421.20

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Solution

The fourth proportional to 13,440.39, 20,161.04 and 6,421.20 is: 9,632.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,440.39 : 20,161.04 = 6,421.20 : x
  2. Step 2: Convert to fraction form
    13,440.39/20,161.04 = 6,421.20/x
  3. Step 3: Cross multiply
    13,440.39x = 20,161.04 × 6,421.20
  4. Step 4: Simplify right side
    13,440.39x = 129,458,037.94
  5. Step 5: Solve for x
    x = 129,458,037.94/13,440.39
  6. Step 6: Final answer
    x = 9,632.01

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.