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Finding the Fourth Proportional to 20,199.70, 30,343.20 and 17,085.88

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Solution

The fourth proportional to 20,199.70, 30,343.20 and 17,085.88 is: 25,665.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,199.70 : 30,343.20 = 17,085.88 : x
  2. Step 2: Convert to fraction form
    20,199.70/30,343.20 = 17,085.88/x
  3. Step 3: Cross multiply
    20,199.70x = 30,343.20 × 17,085.88
  4. Step 4: Simplify right side
    20,199.70x = 518,440,274.02
  5. Step 5: Solve for x
    x = 518,440,274.02/20,199.70
  6. Step 6: Final answer
    x = 25,665.74

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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.