Home / 11,921.40-17,881.30-4,899.59

Finding the Fourth Proportional to 11,921.40, 17,881.30 and 4,899.59

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Solution

The fourth proportional to 11,921.40, 17,881.30 and 4,899.59 is: 7,349.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,921.40 : 17,881.30 = 4,899.59 : x
  2. Step 2: Convert to fraction form
    11,921.40/17,881.30 = 4,899.59/x
  3. Step 3: Cross multiply
    11,921.40x = 17,881.30 × 4,899.59
  4. Step 4: Simplify right side
    11,921.40x = 87,611,071.12
  5. Step 5: Solve for x
    x = 87,611,071.12/11,921.40
  6. Step 6: Final answer
    x = 7,349.06

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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.