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Finding the Fourth Proportional to 18,460.71, 27,691.07 and 5,313.20

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Solution

The fourth proportional to 18,460.71, 27,691.07 and 5,313.20 is: 7,969.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,460.71 : 27,691.07 = 5,313.20 : x
  2. Step 2: Convert to fraction form
    18,460.71/27,691.07 = 5,313.20/x
  3. Step 3: Cross multiply
    18,460.71x = 27,691.07 × 5,313.20
  4. Step 4: Simplify right side
    18,460.71x = 147,128,028.10
  5. Step 5: Solve for x
    x = 147,128,028.10/18,460.71
  6. Step 6: Final answer
    x = 7,969.79

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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.