Home / 13,128.81-19,650.07-9,991.88

Finding the Fourth Proportional to 13,128.81, 19,650.07 and 9,991.88

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Solution

The fourth proportional to 13,128.81, 19,650.07 and 9,991.88 is: 14,954.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,128.81 : 19,650.07 = 9,991.88 : x
  2. Step 2: Convert to fraction form
    13,128.81/19,650.07 = 9,991.88/x
  3. Step 3: Cross multiply
    13,128.81x = 19,650.07 × 9,991.88
  4. Step 4: Simplify right side
    13,128.81x = 196,341,141.43
  5. Step 5: Solve for x
    x = 196,341,141.43/13,128.81
  6. Step 6: Final answer
    x = 14,954.98

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.