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Finding the Fourth Proportional to 18,579.40, 27,870 and 7,484.59

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Solution

The fourth proportional to 18,579.40, 27,870 and 7,484.59 is: 11,227.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,579.40 : 27,870 = 7,484.59 : x
  2. Step 2: Convert to fraction form
    18,579.40/27,870 = 7,484.59/x
  3. Step 3: Cross multiply
    18,579.40x = 27,870 × 7,484.59
  4. Step 4: Simplify right side
    18,579.40x = 208,595,523.30
  5. Step 5: Solve for x
    x = 208,595,523.30/18,579.40
  6. Step 6: Final answer
    x = 11,227.25

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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.