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Finding the Fourth Proportional to 12,149.98, 18,158.40 and 8,869.98

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Solution

The fourth proportional to 12,149.98, 18,158.40 and 8,869.98 is: 13,256.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,149.98 : 18,158.40 = 8,869.98 : x
  2. Step 2: Convert to fraction form
    12,149.98/18,158.40 = 8,869.98/x
  3. Step 3: Cross multiply
    12,149.98x = 18,158.40 × 8,869.98
  4. Step 4: Simplify right side
    12,149.98x = 161,064,644.83
  5. Step 5: Solve for x
    x = 161,064,644.83/12,149.98
  6. Step 6: Final answer
    x = 13,256.37

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.