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Finding the Fourth Proportional to 9,291.40, 13,920.86 and 7,741.36

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Solution

The fourth proportional to 9,291.40, 13,920.86 and 7,741.36 is: 11,598.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,291.40 : 13,920.86 = 7,741.36 : x
  2. Step 2: Convert to fraction form
    9,291.40/13,920.86 = 7,741.36/x
  3. Step 3: Cross multiply
    9,291.40x = 13,920.86 × 7,741.36
  4. Step 4: Simplify right side
    9,291.40x = 107,766,388.77
  5. Step 5: Solve for x
    x = 107,766,388.77/9,291.40
  6. Step 6: Final answer
    x = 11,598.51

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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.