Home / 20,987.96-28,963.31-11,556.52

Finding the Fourth Proportional to 20,987.96, 28,963.31 and 11,556.52

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Solution

The fourth proportional to 20,987.96, 28,963.31 and 11,556.52 is: 15,947.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,987.96 : 28,963.31 = 11,556.52 : x
  2. Step 2: Convert to fraction form
    20,987.96/28,963.31 = 11,556.52/x
  3. Step 3: Cross multiply
    20,987.96x = 28,963.31 × 11,556.52
  4. Step 4: Simplify right side
    20,987.96x = 334,715,071.28
  5. Step 5: Solve for x
    x = 334,715,071.28/20,987.96
  6. Step 6: Final answer
    x = 15,947.96

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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.