Home / 20,531.72-28,333.31-11,579.00

Finding the Fourth Proportional to 20,531.72, 28,333.31 and 11,579.00

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Solution

The fourth proportional to 20,531.72, 28,333.31 and 11,579.00 is: 15,978.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,531.72 : 28,333.31 = 11,579.00 : x
  2. Step 2: Convert to fraction form
    20,531.72/28,333.31 = 11,579.00/x
  3. Step 3: Cross multiply
    20,531.72x = 28,333.31 × 11,579.00
  4. Step 4: Simplify right side
    20,531.72x = 328,071,196.93
  5. Step 5: Solve for x
    x = 328,071,196.93/20,531.72
  6. Step 6: Final answer
    x = 15,978.75

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.