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Finding the Fourth Proportional to 18,399.78, 27,603.74 and 6,712.96

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Solution

The fourth proportional to 18,399.78, 27,603.74 and 6,712.96 is: 10,070.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,399.78 : 27,603.74 = 6,712.96 : x
  2. Step 2: Convert to fraction form
    18,399.78/27,603.74 = 6,712.96/x
  3. Step 3: Cross multiply
    18,399.78x = 27,603.74 × 6,712.96
  4. Step 4: Simplify right side
    18,399.78x = 185,302,802.47
  5. Step 5: Solve for x
    x = 185,302,802.47/18,399.78
  6. Step 6: Final answer
    x = 10,070.92

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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.