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Finding the Fourth Proportional to 20,013.60, 30,020.40 and 12,237.60

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Solution

The fourth proportional to 20,013.60, 30,020.40 and 12,237.60 is: 18,356.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,013.60 : 30,020.40 = 12,237.60 : x
  2. Step 2: Convert to fraction form
    20,013.60/30,020.40 = 12,237.60/x
  3. Step 3: Cross multiply
    20,013.60x = 30,020.40 × 12,237.60
  4. Step 4: Simplify right side
    20,013.60x = 367,377,647.04
  5. Step 5: Solve for x
    x = 367,377,647.04/20,013.60
  6. Step 6: Final answer
    x = 18,356.40

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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.