Home / 10,481.40-15,685.65-7,200.90

Finding the Fourth Proportional to 10,481.40, 15,685.65 and 7,200.90

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Solution

The fourth proportional to 10,481.40, 15,685.65 and 7,200.90 is: 10,776.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,481.40 : 15,685.65 = 7,200.90 : x
  2. Step 2: Convert to fraction form
    10,481.40/15,685.65 = 7,200.90/x
  3. Step 3: Cross multiply
    10,481.40x = 15,685.65 × 7,200.90
  4. Step 4: Simplify right side
    10,481.40x = 112,950,797.09
  5. Step 5: Solve for x
    x = 112,950,797.09/10,481.40
  6. Step 6: Final answer
    x = 10,776.31

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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.