Home / 20,987.68-28,962.12-12,028.96

Finding the Fourth Proportional to 20,987.68, 28,962.12 and 12,028.96

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Solution

The fourth proportional to 20,987.68, 28,962.12 and 12,028.96 is: 16,599.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,987.68 : 28,962.12 = 12,028.96 : x
  2. Step 2: Convert to fraction form
    20,987.68/28,962.12 = 12,028.96/x
  3. Step 3: Cross multiply
    20,987.68x = 28,962.12 × 12,028.96
  4. Step 4: Simplify right side
    20,987.68x = 348,384,183.00
  5. Step 5: Solve for x
    x = 348,384,183.00/20,987.68
  6. Step 6: Final answer
    x = 16,599.46

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.