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Finding the Fourth Proportional to 18,628.47, 27,942.70 and 4,777.47

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Solution

The fourth proportional to 18,628.47, 27,942.70 and 4,777.47 is: 7,166.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,628.47 : 27,942.70 = 4,777.47 : x
  2. Step 2: Convert to fraction form
    18,628.47/27,942.70 = 4,777.47/x
  3. Step 3: Cross multiply
    18,628.47x = 27,942.70 × 4,777.47
  4. Step 4: Simplify right side
    18,628.47x = 133,495,410.97
  5. Step 5: Solve for x
    x = 133,495,410.97/18,628.47
  6. Step 6: Final answer
    x = 7,166.20

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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.