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Finding the Fourth Proportional to 9,918.88, 13,690.08 and 5,726.56

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Solution

The fourth proportional to 9,918.88, 13,690.08 and 5,726.56 is: 7,903.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,918.88 : 13,690.08 = 5,726.56 : x
  2. Step 2: Convert to fraction form
    9,918.88/13,690.08 = 5,726.56/x
  3. Step 3: Cross multiply
    9,918.88x = 13,690.08 × 5,726.56
  4. Step 4: Simplify right side
    9,918.88x = 78,397,064.52
  5. Step 5: Solve for x
    x = 78,397,064.52/9,918.88
  6. Step 6: Final answer
    x = 7,903.82

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.