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Finding the Fourth Proportional to 14,669.51, 20,243.89 and 7,955.11

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Solution

The fourth proportional to 14,669.51, 20,243.89 and 7,955.11 is: 10,978.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,669.51 : 20,243.89 = 7,955.11 : x
  2. Step 2: Convert to fraction form
    14,669.51/20,243.89 = 7,955.11/x
  3. Step 3: Cross multiply
    14,669.51x = 20,243.89 × 7,955.11
  4. Step 4: Simplify right side
    14,669.51x = 161,042,371.78
  5. Step 5: Solve for x
    x = 161,042,371.78/14,669.51
  6. Step 6: Final answer
    x = 10,978.03

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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.