Home / 20,602.97-28,422.28-11,989.16

Finding the Fourth Proportional to 20,602.97, 28,422.28 and 11,989.16

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Solution

The fourth proportional to 20,602.97, 28,422.28 and 11,989.16 is: 16,539.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,602.97 : 28,422.28 = 11,989.16 : x
  2. Step 2: Convert to fraction form
    20,602.97/28,422.28 = 11,989.16/x
  3. Step 3: Cross multiply
    20,602.97x = 28,422.28 × 11,989.16
  4. Step 4: Simplify right side
    20,602.97x = 340,759,145.15
  5. Step 5: Solve for x
    x = 340,759,145.15/20,602.97
  6. Step 6: Final answer
    x = 16,539.32

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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.