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Finding the Fourth Proportional to 18,991.98, 26,174.13 and 12,607.29

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Solution

The fourth proportional to 18,991.98, 26,174.13 and 12,607.29 is: 17,374.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,991.98 : 26,174.13 = 12,607.29 : x
  2. Step 2: Convert to fraction form
    18,991.98/26,174.13 = 12,607.29/x
  3. Step 3: Cross multiply
    18,991.98x = 26,174.13 × 12,607.29
  4. Step 4: Simplify right side
    18,991.98x = 329,984,847.41
  5. Step 5: Solve for x
    x = 329,984,847.41/18,991.98
  6. Step 6: Final answer
    x = 17,374.96

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.