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Finding the Fourth Proportional to 21,995.84, 30,350.11 and 13,040.08

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Solution

The fourth proportional to 21,995.84, 30,350.11 and 13,040.08 is: 17,992.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,995.84 : 30,350.11 = 13,040.08 : x
  2. Step 2: Convert to fraction form
    21,995.84/30,350.11 = 13,040.08/x
  3. Step 3: Cross multiply
    21,995.84x = 30,350.11 × 13,040.08
  4. Step 4: Simplify right side
    21,995.84x = 395,767,862.41
  5. Step 5: Solve for x
    x = 395,767,862.41/21,995.84
  6. Step 6: Final answer
    x = 17,992.85

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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.