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Finding the Fourth Proportional to 27,690.66, 38,208 and 15,753.30

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Solution

The fourth proportional to 27,690.66, 38,208 and 15,753.30 is: 21,736.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,690.66 : 38,208 = 15,753.30 : x
  2. Step 2: Convert to fraction form
    27,690.66/38,208 = 15,753.30/x
  3. Step 3: Cross multiply
    27,690.66x = 38,208 × 15,753.30
  4. Step 4: Simplify right side
    27,690.66x = 601,902,086.40
  5. Step 5: Solve for x
    x = 601,902,086.40/27,690.66
  6. Step 6: Final answer
    x = 21,736.65

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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.