Home / 20,987.56-28,963.47-11,556.46

Finding the Fourth Proportional to 20,987.56, 28,963.47 and 11,556.46

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Solution

The fourth proportional to 20,987.56, 28,963.47 and 11,556.46 is: 15,948.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,987.56 : 28,963.47 = 11,556.46 : x
  2. Step 2: Convert to fraction form
    20,987.56/28,963.47 = 11,556.46/x
  3. Step 3: Cross multiply
    20,987.56x = 28,963.47 × 11,556.46
  4. Step 4: Simplify right side
    20,987.56x = 334,715,182.52
  5. Step 5: Solve for x
    x = 334,715,182.52/20,987.56
  6. Step 6: Final answer
    x = 15,948.27

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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.