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Finding the Fourth Proportional to 20,061.72, 30,138.72 and 14,152.21

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Solution

The fourth proportional to 20,061.72, 30,138.72 and 14,152.21 is: 21,260.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,061.72 : 30,138.72 = 14,152.21 : x
  2. Step 2: Convert to fraction form
    20,061.72/30,138.72 = 14,152.21/x
  3. Step 3: Cross multiply
    20,061.72x = 30,138.72 × 14,152.21
  4. Step 4: Simplify right side
    20,061.72x = 426,529,366.15
  5. Step 5: Solve for x
    x = 426,529,366.15/20,061.72
  6. Step 6: Final answer
    x = 21,260.86

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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.