Home / 21,988.88-30,333.46-13,908.92

Finding the Fourth Proportional to 21,988.88, 30,333.46 and 13,908.92

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Solution

The fourth proportional to 21,988.88, 30,333.46 and 13,908.92 is: 19,187.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,988.88 : 30,333.46 = 13,908.92 : x
  2. Step 2: Convert to fraction form
    21,988.88/30,333.46 = 13,908.92/x
  3. Step 3: Cross multiply
    21,988.88x = 30,333.46 × 13,908.92
  4. Step 4: Simplify right side
    21,988.88x = 421,905,739.18
  5. Step 5: Solve for x
    x = 421,905,739.18/21,988.88
  6. Step 6: Final answer
    x = 19,187.23

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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.