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Finding the Fourth Proportional to 20,001.60, 29,944.80 and 12,225.60

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Solution

The fourth proportional to 20,001.60, 29,944.80 and 12,225.60 is: 18,303.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,001.60 : 29,944.80 = 12,225.60 : x
  2. Step 2: Convert to fraction form
    20,001.60/29,944.80 = 12,225.60/x
  3. Step 3: Cross multiply
    20,001.60x = 29,944.80 × 12,225.60
  4. Step 4: Simplify right side
    20,001.60x = 366,093,146.88
  5. Step 5: Solve for x
    x = 366,093,146.88/20,001.60
  6. Step 6: Final answer
    x = 18,303.19

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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.