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Finding the Fourth Proportional to 18,447.45, 27,684.47 and 7,347.72

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Solution

The fourth proportional to 18,447.45, 27,684.47 and 7,347.72 is: 11,026.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,447.45 : 27,684.47 = 7,347.72 : x
  2. Step 2: Convert to fraction form
    18,447.45/27,684.47 = 7,347.72/x
  3. Step 3: Cross multiply
    18,447.45x = 27,684.47 × 7,347.72
  4. Step 4: Simplify right side
    18,447.45x = 203,417,595.49
  5. Step 5: Solve for x
    x = 203,417,595.49/18,447.45
  6. Step 6: Final answer
    x = 11,026.87

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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.