Home / 20,205.09-30,276.20-7,718.30

Finding the Fourth Proportional to 20,205.09, 30,276.20 and 7,718.30

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Solution

The fourth proportional to 20,205.09, 30,276.20 and 7,718.30 is: 11,565.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,205.09 : 30,276.20 = 7,718.30 : x
  2. Step 2: Convert to fraction form
    20,205.09/30,276.20 = 7,718.30/x
  3. Step 3: Cross multiply
    20,205.09x = 30,276.20 × 7,718.30
  4. Step 4: Simplify right side
    20,205.09x = 233,680,755.87
  5. Step 5: Solve for x
    x = 233,680,755.87/20,205.09
  6. Step 6: Final answer
    x = 11,565.44

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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.