Home / 10,511.28-15,778.80-7,200.72

Finding the Fourth Proportional to 10,511.28, 15,778.80 and 7,200.72

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Solution

The fourth proportional to 10,511.28, 15,778.80 and 7,200.72 is: 10,809.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,511.28 : 15,778.80 = 7,200.72 : x
  2. Step 2: Convert to fraction form
    10,511.28/15,778.80 = 7,200.72/x
  3. Step 3: Cross multiply
    10,511.28x = 15,778.80 × 7,200.72
  4. Step 4: Simplify right side
    10,511.28x = 113,618,720.74
  5. Step 5: Solve for x
    x = 113,618,720.74/10,511.28
  6. Step 6: Final answer
    x = 10,809.22

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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.