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Finding the Fourth Proportional to 20,276.40, 30,401.40 and 18,202.80

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Solution

The fourth proportional to 20,276.40, 30,401.40 and 18,202.80 is: 27,292.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,276.40 : 30,401.40 = 18,202.80 : x
  2. Step 2: Convert to fraction form
    20,276.40/30,401.40 = 18,202.80/x
  3. Step 3: Cross multiply
    20,276.40x = 30,401.40 × 18,202.80
  4. Step 4: Simplify right side
    20,276.40x = 553,390,603.92
  5. Step 5: Solve for x
    x = 553,390,603.92/20,276.40
  6. Step 6: Final answer
    x = 27,292.35

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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.