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Finding the Fourth Proportional to 20,492.84, 30,737.91 and 8,641.55

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Solution

The fourth proportional to 20,492.84, 30,737.91 and 8,641.55 is: 12,961.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,492.84 : 30,737.91 = 8,641.55 : x
  2. Step 2: Convert to fraction form
    20,492.84/30,737.91 = 8,641.55/x
  3. Step 3: Cross multiply
    20,492.84x = 30,737.91 × 8,641.55
  4. Step 4: Simplify right side
    20,492.84x = 265,623,186.16
  5. Step 5: Solve for x
    x = 265,623,186.16/20,492.84
  6. Step 6: Final answer
    x = 12,961.76

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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.