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Finding the Fourth Proportional to 20,611.79, 30,920.12 and 6,566.93

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Solution

The fourth proportional to 20,611.79, 30,920.12 and 6,566.93 is: 9,851.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,611.79 : 30,920.12 = 6,566.93 : x
  2. Step 2: Convert to fraction form
    20,611.79/30,920.12 = 6,566.93/x
  3. Step 3: Cross multiply
    20,611.79x = 30,920.12 × 6,566.93
  4. Step 4: Simplify right side
    20,611.79x = 203,050,230.80
  5. Step 5: Solve for x
    x = 203,050,230.80/20,611.79
  6. Step 6: Final answer
    x = 9,851.17

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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.