Home / 20,987.16-28,962.66-11,427.33

Finding the Fourth Proportional to 20,987.16, 28,962.66 and 11,427.33

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Solution

The fourth proportional to 20,987.16, 28,962.66 and 11,427.33 is: 15,769.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,987.16 : 28,962.66 = 11,427.33 : x
  2. Step 2: Convert to fraction form
    20,987.16/28,962.66 = 11,427.33/x
  3. Step 3: Cross multiply
    20,987.16x = 28,962.66 × 11,427.33
  4. Step 4: Simplify right side
    20,987.16x = 330,965,873.50
  5. Step 5: Solve for x
    x = 330,965,873.50/20,987.16
  6. Step 6: Final answer
    x = 15,769.92

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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.