Home / 28,072.20-38,742.36-20,986.32

Finding the Fourth Proportional to 28,072.20, 38,742.36 and 20,986.32

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Solution

The fourth proportional to 28,072.20, 38,742.36 and 20,986.32 is: 28,963.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,072.20 : 38,742.36 = 20,986.32 : x
  2. Step 2: Convert to fraction form
    28,072.20/38,742.36 = 20,986.32/x
  3. Step 3: Cross multiply
    28,072.20x = 38,742.36 × 20,986.32
  4. Step 4: Simplify right side
    28,072.20x = 813,059,564.52
  5. Step 5: Solve for x
    x = 813,059,564.52/28,072.20
  6. Step 6: Final answer
    x = 28,963.16

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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.