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Finding the Fourth Proportional to 20,407.76, 30,611.04 and 8,567.84

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Solution

The fourth proportional to 20,407.76, 30,611.04 and 8,567.84 is: 12,851.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,407.76 : 30,611.04 = 8,567.84 : x
  2. Step 2: Convert to fraction form
    20,407.76/30,611.04 = 8,567.84/x
  3. Step 3: Cross multiply
    20,407.76x = 30,611.04 × 8,567.84
  4. Step 4: Simplify right side
    20,407.76x = 262,270,492.95
  5. Step 5: Solve for x
    x = 262,270,492.95/20,407.76
  6. Step 6: Final answer
    x = 12,851.51

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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.