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Finding the Fourth Proportional to 15,761.66, 21,751.07 and 9,048.87

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Solution

The fourth proportional to 15,761.66, 21,751.07 and 9,048.87 is: 12,487.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,761.66 : 21,751.07 = 9,048.87 : x
  2. Step 2: Convert to fraction form
    15,761.66/21,751.07 = 9,048.87/x
  3. Step 3: Cross multiply
    15,761.66x = 21,751.07 × 9,048.87
  4. Step 4: Simplify right side
    15,761.66x = 196,822,559.55
  5. Step 5: Solve for x
    x = 196,822,559.55/15,761.66
  6. Step 6: Final answer
    x = 12,487.43

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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.