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Finding the Fourth Proportional to 43,772.40, 65,658.60 and 18,808.20

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Solution

The fourth proportional to 43,772.40, 65,658.60 and 18,808.20 is: 28,212.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,772.40 : 65,658.60 = 18,808.20 : x
  2. Step 2: Convert to fraction form
    43,772.40/65,658.60 = 18,808.20/x
  3. Step 3: Cross multiply
    43,772.40x = 65,658.60 × 18,808.20
  4. Step 4: Simplify right side
    43,772.40x = 1,234,920,080.52
  5. Step 5: Solve for x
    x = 1,234,920,080.52/43,772.40
  6. Step 6: Final answer
    x = 28,212.30

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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.