Home / 20,421.48-30,617.82-7,931.10

Finding the Fourth Proportional to 20,421.48, 30,617.82 and 7,931.10

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Solution

The fourth proportional to 20,421.48, 30,617.82 and 7,931.10 is: 11,891.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,421.48 : 30,617.82 = 7,931.10 : x
  2. Step 2: Convert to fraction form
    20,421.48/30,617.82 = 7,931.10/x
  3. Step 3: Cross multiply
    20,421.48x = 30,617.82 × 7,931.10
  4. Step 4: Simplify right side
    20,421.48x = 242,832,992.20
  5. Step 5: Solve for x
    x = 242,832,992.20/20,421.48
  6. Step 6: Final answer
    x = 11,891.06

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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.