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Finding the Fourth Proportional to 21,898.96, 30,230.57 and 13,951.95

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Solution

The fourth proportional to 21,898.96, 30,230.57 and 13,951.95 is: 19,260.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,898.96 : 30,230.57 = 13,951.95 : x
  2. Step 2: Convert to fraction form
    21,898.96/30,230.57 = 13,951.95/x
  3. Step 3: Cross multiply
    21,898.96x = 30,230.57 × 13,951.95
  4. Step 4: Simplify right side
    21,898.96x = 421,775,244.15
  5. Step 5: Solve for x
    x = 421,775,244.15/21,898.96
  6. Step 6: Final answer
    x = 19,260.06

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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.