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Finding the Fourth Proportional to 18,478.74, 27,718.38 and 4,627.74

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Solution

The fourth proportional to 18,478.74, 27,718.38 and 4,627.74 is: 6,941.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,478.74 : 27,718.38 = 4,627.74 : x
  2. Step 2: Convert to fraction form
    18,478.74/27,718.38 = 4,627.74/x
  3. Step 3: Cross multiply
    18,478.74x = 27,718.38 × 4,627.74
  4. Step 4: Simplify right side
    18,478.74x = 128,273,455.86
  5. Step 5: Solve for x
    x = 128,273,455.86/18,478.74
  6. Step 6: Final answer
    x = 6,941.68

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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.