Home / 28,986.75-43,464.15-8,990.71

Finding the Fourth Proportional to 28,986.75, 43,464.15 and 8,990.71

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Solution

The fourth proportional to 28,986.75, 43,464.15 and 8,990.71 is: 13,481.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,986.75 : 43,464.15 = 8,990.71 : x
  2. Step 2: Convert to fraction form
    28,986.75/43,464.15 = 8,990.71/x
  3. Step 3: Cross multiply
    28,986.75x = 43,464.15 × 8,990.71
  4. Step 4: Simplify right side
    28,986.75x = 390,773,459.39
  5. Step 5: Solve for x
    x = 390,773,459.39/28,986.75
  6. Step 6: Final answer
    x = 13,481.11

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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.