Home / 13,381.62-19,991.02-8,663.18

Finding the Fourth Proportional to 13,381.62, 19,991.02 and 8,663.18

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Solution

The fourth proportional to 13,381.62, 19,991.02 and 8,663.18 is: 12,942.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,381.62 : 19,991.02 = 8,663.18 : x
  2. Step 2: Convert to fraction form
    13,381.62/19,991.02 = 8,663.18/x
  3. Step 3: Cross multiply
    13,381.62x = 19,991.02 × 8,663.18
  4. Step 4: Simplify right side
    13,381.62x = 173,185,804.64
  5. Step 5: Solve for x
    x = 173,185,804.64/13,381.62
  6. Step 6: Final answer
    x = 12,942.07

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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.