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Finding the Fourth Proportional to 21,955.50, 30,245.13 and 16,645.14

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Solution

The fourth proportional to 21,955.50, 30,245.13 and 16,645.14 is: 22,929.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,955.50 : 30,245.13 = 16,645.14 : x
  2. Step 2: Convert to fraction form
    21,955.50/30,245.13 = 16,645.14/x
  3. Step 3: Cross multiply
    21,955.50x = 30,245.13 × 16,645.14
  4. Step 4: Simplify right side
    21,955.50x = 503,434,423.17
  5. Step 5: Solve for x
    x = 503,434,423.17/21,955.50
  6. Step 6: Final answer
    x = 22,929.76

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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.