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Finding the Fourth Proportional to 43,987.68, 65,976.24 and 12,400.12

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Solution

The fourth proportional to 43,987.68, 65,976.24 and 12,400.12 is: 18,598.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,987.68 : 65,976.24 = 12,400.12 : x
  2. Step 2: Convert to fraction form
    43,987.68/65,976.24 = 12,400.12/x
  3. Step 3: Cross multiply
    43,987.68x = 65,976.24 × 12,400.12
  4. Step 4: Simplify right side
    43,987.68x = 818,113,293.15
  5. Step 5: Solve for x
    x = 818,113,293.15/43,987.68
  6. Step 6: Final answer
    x = 18,598.69

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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.