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Finding the Fourth Proportional to 21,995.97, 30,347.30 and 12,434.94

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Solution

The fourth proportional to 21,995.97, 30,347.30 and 12,434.94 is: 17,156.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,995.97 : 30,347.30 = 12,434.94 : x
  2. Step 2: Convert to fraction form
    21,995.97/30,347.30 = 12,434.94/x
  3. Step 3: Cross multiply
    21,995.97x = 30,347.30 × 12,434.94
  4. Step 4: Simplify right side
    21,995.97x = 377,366,792.49
  5. Step 5: Solve for x
    x = 377,366,792.49/21,995.97
  6. Step 6: Final answer
    x = 17,156.18

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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.