Home / 21,803.91-30,089.11-12,851.79

Finding the Fourth Proportional to 21,803.91, 30,089.11 and 12,851.79

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Solution

The fourth proportional to 21,803.91, 30,089.11 and 12,851.79 is: 17,735.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,803.91 : 30,089.11 = 12,851.79 : x
  2. Step 2: Convert to fraction form
    21,803.91/30,089.11 = 12,851.79/x
  3. Step 3: Cross multiply
    21,803.91x = 30,089.11 × 12,851.79
  4. Step 4: Simplify right side
    21,803.91x = 386,698,923.01
  5. Step 5: Solve for x
    x = 386,698,923.01/21,803.91
  6. Step 6: Final answer
    x = 17,735.30

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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.