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Finding the Fourth Proportional to 11,913.56, 17,870.23 and 3,028.91

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Solution

The fourth proportional to 11,913.56, 17,870.23 and 3,028.91 is: 4,543.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,913.56 : 17,870.23 = 3,028.91 : x
  2. Step 2: Convert to fraction form
    11,913.56/17,870.23 = 3,028.91/x
  3. Step 3: Cross multiply
    11,913.56x = 17,870.23 × 3,028.91
  4. Step 4: Simplify right side
    11,913.56x = 54,127,318.35
  5. Step 5: Solve for x
    x = 54,127,318.35/11,913.56
  6. Step 6: Final answer
    x = 4,543.34

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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.