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Finding the Fourth Proportional to 43,870.60, 65,781.60 and 18,906.40

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Solution

The fourth proportional to 43,870.60, 65,781.60 and 18,906.40 is: 28,349.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,870.60 : 65,781.60 = 18,906.40 : x
  2. Step 2: Convert to fraction form
    43,870.60/65,781.60 = 18,906.40/x
  3. Step 3: Cross multiply
    43,870.60x = 65,781.60 × 18,906.40
  4. Step 4: Simplify right side
    43,870.60x = 1,243,693,242.24
  5. Step 5: Solve for x
    x = 1,243,693,242.24/43,870.60
  6. Step 6: Final answer
    x = 28,349.13

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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.