Home / 20,412.06-30,618.08-5,621.12

Finding the Fourth Proportional to 20,412.06, 30,618.08 and 5,621.12

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Solution

The fourth proportional to 20,412.06, 30,618.08 and 5,621.12 is: 8,431.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,412.06 : 30,618.08 = 5,621.12 : x
  2. Step 2: Convert to fraction form
    20,412.06/30,618.08 = 5,621.12/x
  3. Step 3: Cross multiply
    20,412.06x = 30,618.08 × 5,621.12
  4. Step 4: Simplify right side
    20,412.06x = 172,107,901.85
  5. Step 5: Solve for x
    x = 172,107,901.85/20,412.06
  6. Step 6: Final answer
    x = 8,431.68

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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.