Home / 21,188.28-31,832.04-19,991.40

Finding the Fourth Proportional to 21,188.28, 31,832.04 and 19,991.40

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Solution

The fourth proportional to 21,188.28, 31,832.04 and 19,991.40 is: 30,033.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,188.28 : 31,832.04 = 19,991.40 : x
  2. Step 2: Convert to fraction form
    21,188.28/31,832.04 = 19,991.40/x
  3. Step 3: Cross multiply
    21,188.28x = 31,832.04 × 19,991.40
  4. Step 4: Simplify right side
    21,188.28x = 636,367,044.46
  5. Step 5: Solve for x
    x = 636,367,044.46/21,188.28
  6. Step 6: Final answer
    x = 30,033.92

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.