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Finding the Fourth Proportional to 21,042.54, 31,560.48 and 7,012.35

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Solution

The fourth proportional to 21,042.54, 31,560.48 and 7,012.35 is: 10,517.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,042.54 : 31,560.48 = 7,012.35 : x
  2. Step 2: Convert to fraction form
    21,042.54/31,560.48 = 7,012.35/x
  3. Step 3: Cross multiply
    21,042.54x = 31,560.48 × 7,012.35
  4. Step 4: Simplify right side
    21,042.54x = 221,313,131.93
  5. Step 5: Solve for x
    x = 221,313,131.93/21,042.54
  6. Step 6: Final answer
    x = 10,517.42

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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.