Home / 15,531.32-21,431.04-8,814.80

Finding the Fourth Proportional to 15,531.32, 21,431.04 and 8,814.80

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Solution

The fourth proportional to 15,531.32, 21,431.04 and 8,814.80 is: 12,163.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,531.32 : 21,431.04 = 8,814.80 : x
  2. Step 2: Convert to fraction form
    15,531.32/21,431.04 = 8,814.80/x
  3. Step 3: Cross multiply
    15,531.32x = 21,431.04 × 8,814.80
  4. Step 4: Simplify right side
    15,531.32x = 188,910,331.39
  5. Step 5: Solve for x
    x = 188,910,331.39/15,531.32
  6. Step 6: Final answer
    x = 12,163.19

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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.