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Finding the Fourth Proportional to 18,628.76, 27,943.86 and 4,777.76

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Solution

The fourth proportional to 18,628.76, 27,943.86 and 4,777.76 is: 7,166.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,628.76 : 27,943.86 = 4,777.76 : x
  2. Step 2: Convert to fraction form
    18,628.76/27,943.86 = 4,777.76/x
  3. Step 3: Cross multiply
    18,628.76x = 27,943.86 × 4,777.76
  4. Step 4: Simplify right side
    18,628.76x = 133,509,056.55
  5. Step 5: Solve for x
    x = 133,509,056.55/18,628.76
  6. Step 6: Final answer
    x = 7,166.82

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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.