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Finding the Fourth Proportional to 21,798.96, 30,091.70 and 14,734.95

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Solution

The fourth proportional to 21,798.96, 30,091.70 and 14,734.95 is: 20,340.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,798.96 : 30,091.70 = 14,734.95 : x
  2. Step 2: Convert to fraction form
    21,798.96/30,091.70 = 14,734.95/x
  3. Step 3: Cross multiply
    21,798.96x = 30,091.70 × 14,734.95
  4. Step 4: Simplify right side
    21,798.96x = 443,399,694.92
  5. Step 5: Solve for x
    x = 443,399,694.92/21,798.96
  6. Step 6: Final answer
    x = 20,340.41

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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.