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Finding the Fourth Proportional to 21,800.78, 30,084.04 and 12,110.86

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Solution

The fourth proportional to 21,800.78, 30,084.04 and 12,110.86 is: 16,712.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,800.78 : 30,084.04 = 12,110.86 : x
  2. Step 2: Convert to fraction form
    21,800.78/30,084.04 = 12,110.86/x
  3. Step 3: Cross multiply
    21,800.78x = 30,084.04 × 12,110.86
  4. Step 4: Simplify right side
    21,800.78x = 364,343,596.67
  5. Step 5: Solve for x
    x = 364,343,596.67/21,800.78
  6. Step 6: Final answer
    x = 16,712.41

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.