Home / 20,986.42-28,963.02-11,556.76

Finding the Fourth Proportional to 20,986.42, 28,963.02 and 11,556.76

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Solution

The fourth proportional to 20,986.42, 28,963.02 and 11,556.76 is: 15,949.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,986.42 : 28,963.02 = 11,556.76 : x
  2. Step 2: Convert to fraction form
    20,986.42/28,963.02 = 11,556.76/x
  3. Step 3: Cross multiply
    20,986.42x = 28,963.02 × 11,556.76
  4. Step 4: Simplify right side
    20,986.42x = 334,718,671.02
  5. Step 5: Solve for x
    x = 334,718,671.02/20,986.42
  6. Step 6: Final answer
    x = 15,949.30

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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.