Home / 19,990.72-27,582.12-11,376.88

Finding the Fourth Proportional to 19,990.72, 27,582.12 and 11,376.88

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Solution

The fourth proportional to 19,990.72, 27,582.12 and 11,376.88 is: 15,697.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,990.72 : 27,582.12 = 11,376.88 : x
  2. Step 2: Convert to fraction form
    19,990.72/27,582.12 = 11,376.88/x
  3. Step 3: Cross multiply
    19,990.72x = 27,582.12 × 11,376.88
  4. Step 4: Simplify right side
    19,990.72x = 313,798,469.39
  5. Step 5: Solve for x
    x = 313,798,469.39/19,990.72
  6. Step 6: Final answer
    x = 15,697.21

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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.