Home / 20,531.24-28,333.08-11,099.78

Finding the Fourth Proportional to 20,531.24, 28,333.08 and 11,099.78

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Solution

The fourth proportional to 20,531.24, 28,333.08 and 11,099.78 is: 15,317.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,531.24 : 28,333.08 = 11,099.78 : x
  2. Step 2: Convert to fraction form
    20,531.24/28,333.08 = 11,099.78/x
  3. Step 3: Cross multiply
    20,531.24x = 28,333.08 × 11,099.78
  4. Step 4: Simplify right side
    20,531.24x = 314,490,954.72
  5. Step 5: Solve for x
    x = 314,490,954.72/20,531.24
  6. Step 6: Final answer
    x = 15,317.68

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1.5x scale

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.