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Finding the Fourth Proportional to 18,359.74, 27,539.56 and 5,212.12

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Solution

The fourth proportional to 18,359.74, 27,539.56 and 5,212.12 is: 7,818.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,359.74 : 27,539.56 = 5,212.12 : x
  2. Step 2: Convert to fraction form
    18,359.74/27,539.56 = 5,212.12/x
  3. Step 3: Cross multiply
    18,359.74x = 27,539.56 × 5,212.12
  4. Step 4: Simplify right side
    18,359.74x = 143,539,491.47
  5. Step 5: Solve for x
    x = 143,539,491.47/18,359.74
  6. Step 6: Final answer
    x = 7,818.17

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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.