Home / 10,958.68-15,120.30-7,420.60

Finding the Fourth Proportional to 10,958.68, 15,120.30 and 7,420.60

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Solution

The fourth proportional to 10,958.68, 15,120.30 and 7,420.60 is: 10,238.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,958.68 : 15,120.30 = 7,420.60 : x
  2. Step 2: Convert to fraction form
    10,958.68/15,120.30 = 7,420.60/x
  3. Step 3: Cross multiply
    10,958.68x = 15,120.30 × 7,420.60
  4. Step 4: Simplify right side
    10,958.68x = 112,201,698.18
  5. Step 5: Solve for x
    x = 112,201,698.18/10,958.68
  6. Step 6: Final answer
    x = 10,238.61

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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.