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Finding the Fourth Proportional to 13,663.56, 18,869.40 and 8,950.80

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Solution

The fourth proportional to 13,663.56, 18,869.40 and 8,950.80 is: 12,361.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,663.56 : 18,869.40 = 8,950.80 : x
  2. Step 2: Convert to fraction form
    13,663.56/18,869.40 = 8,950.80/x
  3. Step 3: Cross multiply
    13,663.56x = 18,869.40 × 8,950.80
  4. Step 4: Simplify right side
    13,663.56x = 168,896,225.52
  5. Step 5: Solve for x
    x = 168,896,225.52/13,663.56
  6. Step 6: Final answer
    x = 12,361.07

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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.