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Finding the Fourth Proportional to 21,755.40, 30,024.18 and 12,326.28

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Solution

The fourth proportional to 21,755.40, 30,024.18 and 12,326.28 is: 17,011.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,755.40 : 30,024.18 = 12,326.28 : x
  2. Step 2: Convert to fraction form
    21,755.40/30,024.18 = 12,326.28/x
  3. Step 3: Cross multiply
    21,755.40x = 30,024.18 × 12,326.28
  4. Step 4: Simplify right side
    21,755.40x = 370,086,449.45
  5. Step 5: Solve for x
    x = 370,086,449.45/21,755.40
  6. Step 6: Final answer
    x = 17,011.25

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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.