Home / 13,318.20-19,878.54-11,531.27

Finding the Fourth Proportional to 13,318.20, 19,878.54 and 11,531.27

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Solution

The fourth proportional to 13,318.20, 19,878.54 and 11,531.27 is: 17,211.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,318.20 : 19,878.54 = 11,531.27 : x
  2. Step 2: Convert to fraction form
    13,318.20/19,878.54 = 11,531.27/x
  3. Step 3: Cross multiply
    13,318.20x = 19,878.54 × 11,531.27
  4. Step 4: Simplify right side
    13,318.20x = 229,224,818.40
  5. Step 5: Solve for x
    x = 229,224,818.40/13,318.20
  6. Step 6: Final answer
    x = 17,211.40

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.