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Finding the Fourth Proportional to 20,153.70, 30,230.40 and 6,113.70

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Solution

The fourth proportional to 20,153.70, 30,230.40 and 6,113.70 is: 9,170.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,153.70 : 30,230.40 = 6,113.70 : x
  2. Step 2: Convert to fraction form
    20,153.70/30,230.40 = 6,113.70/x
  3. Step 3: Cross multiply
    20,153.70x = 30,230.40 × 6,113.70
  4. Step 4: Simplify right side
    20,153.70x = 184,819,596.48
  5. Step 5: Solve for x
    x = 184,819,596.48/20,153.70
  6. Step 6: Final answer
    x = 9,170.50

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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.