Home / 20,991.13-28,966.83-12,032.21

Finding the Fourth Proportional to 20,991.13, 28,966.83 and 12,032.21

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Solution

The fourth proportional to 20,991.13, 28,966.83 and 12,032.21 is: 16,603.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,991.13 : 28,966.83 = 12,032.21 : x
  2. Step 2: Convert to fraction form
    20,991.13/28,966.83 = 12,032.21/x
  3. Step 3: Cross multiply
    20,991.13x = 28,966.83 × 12,032.21
  4. Step 4: Simplify right side
    20,991.13x = 348,534,921.43
  5. Step 5: Solve for x
    x = 348,534,921.43/20,991.13
  6. Step 6: Final answer
    x = 16,603.91

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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.