Home / 20,760.10-31,145.10-6,720.13

Finding the Fourth Proportional to 20,760.10, 31,145.10 and 6,720.13

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Solution

The fourth proportional to 20,760.10, 31,145.10 and 6,720.13 is: 10,081.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,760.10 : 31,145.10 = 6,720.13 : x
  2. Step 2: Convert to fraction form
    20,760.10/31,145.10 = 6,720.13/x
  3. Step 3: Cross multiply
    20,760.10x = 31,145.10 × 6,720.13
  4. Step 4: Simplify right side
    20,760.10x = 209,299,181.93
  5. Step 5: Solve for x
    x = 209,299,181.93/20,760.10
  6. Step 6: Final answer
    x = 10,081.80

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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.