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Finding the Fourth Proportional to 7,419.90, 11,128.11 and 3,473.88

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Solution

The fourth proportional to 7,419.90, 11,128.11 and 3,473.88 is: 5,210.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,419.90 : 11,128.11 = 3,473.88 : x
  2. Step 2: Convert to fraction form
    7,419.90/11,128.11 = 3,473.88/x
  3. Step 3: Cross multiply
    7,419.90x = 11,128.11 × 3,473.88
  4. Step 4: Simplify right side
    7,419.90x = 38,657,718.77
  5. Step 5: Solve for x
    x = 38,657,718.77/7,419.90
  6. Step 6: Final answer
    x = 5,210.01

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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.