Home / 20,412.30-30,618.76-5,621.06

Finding the Fourth Proportional to 20,412.30, 30,618.76 and 5,621.06

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Solution

The fourth proportional to 20,412.30, 30,618.76 and 5,621.06 is: 8,431.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,412.30 : 30,618.76 = 5,621.06 : x
  2. Step 2: Convert to fraction form
    20,412.30/30,618.76 = 5,621.06/x
  3. Step 3: Cross multiply
    20,412.30x = 30,618.76 × 5,621.06
  4. Step 4: Simplify right side
    20,412.30x = 172,109,887.09
  5. Step 5: Solve for x
    x = 172,109,887.09/20,412.30
  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.