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Finding the Fourth Proportional to 18,305.40, 27,414.90 and 12,430.20

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Solution

The fourth proportional to 18,305.40, 27,414.90 and 12,430.20 is: 18,615.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,305.40 : 27,414.90 = 12,430.20 : x
  2. Step 2: Convert to fraction form
    18,305.40/27,414.90 = 12,430.20/x
  3. Step 3: Cross multiply
    18,305.40x = 27,414.90 × 12,430.20
  4. Step 4: Simplify right side
    18,305.40x = 340,772,689.98
  5. Step 5: Solve for x
    x = 340,772,689.98/18,305.40
  6. Step 6: Final answer
    x = 18,615.97

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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.