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Finding the Fourth Proportional to 15,755.21, 21,741.06 and 9,040.66

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Solution

The fourth proportional to 15,755.21, 21,741.06 and 9,040.66 is: 12,475.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,755.21 : 21,741.06 = 9,040.66 : x
  2. Step 2: Convert to fraction form
    15,755.21/21,741.06 = 9,040.66/x
  3. Step 3: Cross multiply
    15,755.21x = 21,741.06 × 9,040.66
  4. Step 4: Simplify right side
    15,755.21x = 196,553,582.49
  5. Step 5: Solve for x
    x = 196,553,582.49/15,755.21
  6. Step 6: Final answer
    x = 12,475.47

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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.