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Finding the Fourth Proportional to 18,655.94, 27,980.25 and 5,504.78

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Solution

The fourth proportional to 18,655.94, 27,980.25 and 5,504.78 is: 8,256.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,655.94 : 27,980.25 = 5,504.78 : x
  2. Step 2: Convert to fraction form
    18,655.94/27,980.25 = 5,504.78/x
  3. Step 3: Cross multiply
    18,655.94x = 27,980.25 × 5,504.78
  4. Step 4: Simplify right side
    18,655.94x = 154,024,980.69
  5. Step 5: Solve for x
    x = 154,024,980.69/18,655.94
  6. Step 6: Final answer
    x = 8,256.08

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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.