Home / 10,685.43-15,999.39-6,978.47

Finding the Fourth Proportional to 10,685.43, 15,999.39 and 6,978.47

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Solution

The fourth proportional to 10,685.43, 15,999.39 and 6,978.47 is: 10,448.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,685.43 : 15,999.39 = 6,978.47 : x
  2. Step 2: Convert to fraction form
    10,685.43/15,999.39 = 6,978.47/x
  3. Step 3: Cross multiply
    10,685.43x = 15,999.39 × 6,978.47
  4. Step 4: Simplify right side
    10,685.43x = 111,651,183.14
  5. Step 5: Solve for x
    x = 111,651,183.14/10,685.43
  6. Step 6: Final answer
    x = 10,448.92

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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.