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Finding the Fourth Proportional to 18,188.70, 27,300.45 and 9,429.90

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Solution

The fourth proportional to 18,188.70, 27,300.45 and 9,429.90 is: 14,153.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,188.70 : 27,300.45 = 9,429.90 : x
  2. Step 2: Convert to fraction form
    18,188.70/27,300.45 = 9,429.90/x
  3. Step 3: Cross multiply
    18,188.70x = 27,300.45 × 9,429.90
  4. Step 4: Simplify right side
    18,188.70x = 257,440,513.46
  5. Step 5: Solve for x
    x = 257,440,513.46/18,188.70
  6. Step 6: Final answer
    x = 14,153.87

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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.