Home / 14,229.76-19,643.96-9,989.80

Finding the Fourth Proportional to 14,229.76, 19,643.96 and 9,989.80

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Solution

The fourth proportional to 14,229.76, 19,643.96 and 9,989.80 is: 13,790.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,229.76 : 19,643.96 = 9,989.80 : x
  2. Step 2: Convert to fraction form
    14,229.76/19,643.96 = 9,989.80/x
  3. Step 3: Cross multiply
    14,229.76x = 19,643.96 × 9,989.80
  4. Step 4: Simplify right side
    14,229.76x = 196,239,231.61
  5. Step 5: Solve for x
    x = 196,239,231.61/14,229.76
  6. Step 6: Final answer
    x = 13,790.76

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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.