Home / 20,418.40-30,613.12-7,927.90

Finding the Fourth Proportional to 20,418.40, 30,613.12 and 7,927.90

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Solution

The fourth proportional to 20,418.40, 30,613.12 and 7,927.90 is: 11,886.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,418.40 : 30,613.12 = 7,927.90 : x
  2. Step 2: Convert to fraction form
    20,418.40/30,613.12 = 7,927.90/x
  3. Step 3: Cross multiply
    20,418.40x = 30,613.12 × 7,927.90
  4. Step 4: Simplify right side
    20,418.40x = 242,697,754.05
  5. Step 5: Solve for x
    x = 242,697,754.05/20,418.40
  6. Step 6: Final answer
    x = 11,886.23

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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.