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Finding the Fourth Proportional to 18,271.62, 27,398.79 and 8,407.98

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Solution

The fourth proportional to 18,271.62, 27,398.79 and 8,407.98 is: 12,607.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,271.62 : 27,398.79 = 8,407.98 : x
  2. Step 2: Convert to fraction form
    18,271.62/27,398.79 = 8,407.98/x
  3. Step 3: Cross multiply
    18,271.62x = 27,398.79 × 8,407.98
  4. Step 4: Simplify right side
    18,271.62x = 230,368,478.34
  5. Step 5: Solve for x
    x = 230,368,478.34/18,271.62
  6. Step 6: Final answer
    x = 12,607.99

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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.