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Finding the Fourth Proportional to 13,436.61, 20,154.88 and 4,202.61

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Solution

The fourth proportional to 13,436.61, 20,154.88 and 4,202.61 is: 6,303.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,436.61 : 20,154.88 = 4,202.61 : x
  2. Step 2: Convert to fraction form
    13,436.61/20,154.88 = 4,202.61/x
  3. Step 3: Cross multiply
    13,436.61x = 20,154.88 × 4,202.61
  4. Step 4: Simplify right side
    13,436.61x = 84,703,100.24
  5. Step 5: Solve for x
    x = 84,703,100.24/13,436.61
  6. Step 6: Final answer
    x = 6,303.90

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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.