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Finding the Fourth Proportional to 18,640.86, 27,971 and 7,555.74

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Solution

The fourth proportional to 18,640.86, 27,971 and 7,555.74 is: 11,337.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,640.86 : 27,971 = 7,555.74 : x
  2. Step 2: Convert to fraction form
    18,640.86/27,971 = 7,555.74/x
  3. Step 3: Cross multiply
    18,640.86x = 27,971 × 7,555.74
  4. Step 4: Simplify right side
    18,640.86x = 211,341,603.54
  5. Step 5: Solve for x
    x = 211,341,603.54/18,640.86
  6. Step 6: Final answer
    x = 11,337.55

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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.