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Finding the Fourth Proportional to 18,345.78, 27,499.98 and 7,237.20

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Solution

The fourth proportional to 18,345.78, 27,499.98 and 7,237.20 is: 10,848.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,345.78 : 27,499.98 = 7,237.20 : x
  2. Step 2: Convert to fraction form
    18,345.78/27,499.98 = 7,237.20/x
  3. Step 3: Cross multiply
    18,345.78x = 27,499.98 × 7,237.20
  4. Step 4: Simplify right side
    18,345.78x = 199,022,855.26
  5. Step 5: Solve for x
    x = 199,022,855.26/18,345.78
  6. Step 6: Final answer
    x = 10,848.43

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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.