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Finding the Fourth Proportional to 18,390.71, 27,586.34 and 8,897.51

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Solution

The fourth proportional to 18,390.71, 27,586.34 and 8,897.51 is: 13,346.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,390.71 : 27,586.34 = 8,897.51 : x
  2. Step 2: Convert to fraction form
    18,390.71/27,586.34 = 8,897.51/x
  3. Step 3: Cross multiply
    18,390.71x = 27,586.34 × 8,897.51
  4. Step 4: Simplify right side
    18,390.71x = 245,449,553.59
  5. Step 5: Solve for x
    x = 245,449,553.59/18,390.71
  6. Step 6: Final answer
    x = 13,346.39

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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.