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Finding the Fourth Proportional to 20,553.60, 30,830.40 and 7,410.08

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Solution

The fourth proportional to 20,553.60, 30,830.40 and 7,410.08 is: 11,115.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,553.60 : 30,830.40 = 7,410.08 : x
  2. Step 2: Convert to fraction form
    20,553.60/30,830.40 = 7,410.08/x
  3. Step 3: Cross multiply
    20,553.60x = 30,830.40 × 7,410.08
  4. Step 4: Simplify right side
    20,553.60x = 228,455,730.43
  5. Step 5: Solve for x
    x = 228,455,730.43/20,553.60
  6. Step 6: Final answer
    x = 11,115.12

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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.