Home / 10,561.32-15,863.58-8,920.80

Finding the Fourth Proportional to 10,561.32, 15,863.58 and 8,920.80

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Solution

The fourth proportional to 10,561.32, 15,863.58 and 8,920.80 is: 13,399.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,561.32 : 15,863.58 = 8,920.80 : x
  2. Step 2: Convert to fraction form
    10,561.32/15,863.58 = 8,920.80/x
  3. Step 3: Cross multiply
    10,561.32x = 15,863.58 × 8,920.80
  4. Step 4: Simplify right side
    10,561.32x = 141,515,824.46
  5. Step 5: Solve for x
    x = 141,515,824.46/10,561.32
  6. Step 6: Final answer
    x = 13,399.44

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.