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Finding the Fourth Proportional to 18,275.84, 27,415.28 and 7,181.68

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Solution

The fourth proportional to 18,275.84, 27,415.28 and 7,181.68 is: 10,773.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,275.84 : 27,415.28 = 7,181.68 : x
  2. Step 2: Convert to fraction form
    18,275.84/27,415.28 = 7,181.68/x
  3. Step 3: Cross multiply
    18,275.84x = 27,415.28 × 7,181.68
  4. Step 4: Simplify right side
    18,275.84x = 196,887,768.07
  5. Step 5: Solve for x
    x = 196,887,768.07/18,275.84
  6. Step 6: Final answer
    x = 10,773.12

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.