Home / 21,988.67-30,333.21-13,908.71

Finding the Fourth Proportional to 21,988.67, 30,333.21 and 13,908.71

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Solution

The fourth proportional to 21,988.67, 30,333.21 and 13,908.71 is: 19,186.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,988.67 : 30,333.21 = 13,908.71 : x
  2. Step 2: Convert to fraction form
    21,988.67/30,333.21 = 13,908.71/x
  3. Step 3: Cross multiply
    21,988.67x = 30,333.21 × 13,908.71
  4. Step 4: Simplify right side
    21,988.67x = 421,895,844.93
  5. Step 5: Solve for x
    x = 421,895,844.93/21,988.67
  6. Step 6: Final answer
    x = 19,186.97

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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.