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Finding the Fourth Proportional to 20,585.60, 30,840.60 and 11,794.40

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Solution

The fourth proportional to 20,585.60, 30,840.60 and 11,794.40 is: 17,669.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,585.60 : 30,840.60 = 11,794.40 : x
  2. Step 2: Convert to fraction form
    20,585.60/30,840.60 = 11,794.40/x
  3. Step 3: Cross multiply
    20,585.60x = 30,840.60 × 11,794.40
  4. Step 4: Simplify right side
    20,585.60x = 363,746,372.64
  5. Step 5: Solve for x
    x = 363,746,372.64/20,585.60
  6. Step 6: Final answer
    x = 17,669.94

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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.