Home / 20,531.32-28,333.26-11,099.89

Finding the Fourth Proportional to 20,531.32, 28,333.26 and 11,099.89

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Solution

The fourth proportional to 20,531.32, 28,333.26 and 11,099.89 is: 15,317.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,531.32 : 28,333.26 = 11,099.89 : x
  2. Step 2: Convert to fraction form
    20,531.32/28,333.26 = 11,099.89/x
  3. Step 3: Cross multiply
    20,531.32x = 28,333.26 × 11,099.89
  4. Step 4: Simplify right side
    20,531.32x = 314,496,069.34
  5. Step 5: Solve for x
    x = 314,496,069.34/20,531.32
  6. Step 6: Final answer
    x = 15,317.87

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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.