Home / 13,381.43-19,990.75-8,663.00

Finding the Fourth Proportional to 13,381.43, 19,990.75 and 8,663.00

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Solution

The fourth proportional to 13,381.43, 19,990.75 and 8,663.00 is: 12,941.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,381.43 : 19,990.75 = 8,663.00 : x
  2. Step 2: Convert to fraction form
    13,381.43/19,990.75 = 8,663.00/x
  3. Step 3: Cross multiply
    13,381.43x = 19,990.75 × 8,663.00
  4. Step 4: Simplify right side
    13,381.43x = 173,179,723.98
  5. Step 5: Solve for x
    x = 173,179,723.98/13,381.43
  6. Step 6: Final answer
    x = 12,941.80

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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.