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Finding the Fourth Proportional to 13,959.23, 20,941.92 and 7,728.33

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Solution

The fourth proportional to 13,959.23, 20,941.92 and 7,728.33 is: 11,594.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,959.23 : 20,941.92 = 7,728.33 : x
  2. Step 2: Convert to fraction form
    13,959.23/20,941.92 = 7,728.33/x
  3. Step 3: Cross multiply
    13,959.23x = 20,941.92 × 7,728.33
  4. Step 4: Simplify right side
    13,959.23x = 161,846,068.59
  5. Step 5: Solve for x
    x = 161,846,068.59/13,959.23
  6. Step 6: Final answer
    x = 11,594.20

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1.5x scale

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.