Home / 20,987.52-28,962.84-11,556.96

Finding the Fourth Proportional to 20,987.52, 28,962.84 and 11,556.96

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Solution

The fourth proportional to 20,987.52, 28,962.84 and 11,556.96 is: 15,948.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,987.52 : 28,962.84 = 11,556.96 : x
  2. Step 2: Convert to fraction form
    20,987.52/28,962.84 = 11,556.96/x
  3. Step 3: Cross multiply
    20,987.52x = 28,962.84 × 11,556.96
  4. Step 4: Simplify right side
    20,987.52x = 334,722,383.37
  5. Step 5: Solve for x
    x = 334,722,383.37/20,987.52
  6. Step 6: Final answer
    x = 15,948.64

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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.