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Finding the Fourth Proportional to 18,397.74, 27,560.43 and 12,138.63

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Solution

The fourth proportional to 18,397.74, 27,560.43 and 12,138.63 is: 18,184.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,397.74 : 27,560.43 = 12,138.63 : x
  2. Step 2: Convert to fraction form
    18,397.74/27,560.43 = 12,138.63/x
  3. Step 3: Cross multiply
    18,397.74x = 27,560.43 × 12,138.63
  4. Step 4: Simplify right side
    18,397.74x = 334,545,862.41
  5. Step 5: Solve for x
    x = 334,545,862.41/18,397.74
  6. Step 6: Final answer
    x = 18,184.07

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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.