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Finding the Fourth Proportional to 20,037.60, 29,991.60 and 15,631.20

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Solution

The fourth proportional to 20,037.60, 29,991.60 and 15,631.20 is: 23,396.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,037.60 : 29,991.60 = 15,631.20 : x
  2. Step 2: Convert to fraction form
    20,037.60/29,991.60 = 15,631.20/x
  3. Step 3: Cross multiply
    20,037.60x = 29,991.60 × 15,631.20
  4. Step 4: Simplify right side
    20,037.60x = 468,804,697.92
  5. Step 5: Solve for x
    x = 468,804,697.92/20,037.60
  6. Step 6: Final answer
    x = 23,396.25

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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.