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Finding the Fourth Proportional to 13,455.70, 20,183.55 and 10,341.70

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Solution

The fourth proportional to 13,455.70, 20,183.55 and 10,341.70 is: 15,512.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,455.70 : 20,183.55 = 10,341.70 : x
  2. Step 2: Convert to fraction form
    13,455.70/20,183.55 = 10,341.70/x
  3. Step 3: Cross multiply
    13,455.70x = 20,183.55 × 10,341.70
  4. Step 4: Simplify right side
    13,455.70x = 208,732,219.04
  5. Step 5: Solve for x
    x = 208,732,219.04/13,455.70
  6. Step 6: Final answer
    x = 15,512.55

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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.