Home / 9,891.28-13,649.04-5,911.60

Finding the Fourth Proportional to 9,891.28, 13,649.04 and 5,911.60

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Solution

The fourth proportional to 9,891.28, 13,649.04 and 5,911.60 is: 8,157.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,891.28 : 13,649.04 = 5,911.60 : x
  2. Step 2: Convert to fraction form
    9,891.28/13,649.04 = 5,911.60/x
  3. Step 3: Cross multiply
    9,891.28x = 13,649.04 × 5,911.60
  4. Step 4: Simplify right side
    9,891.28x = 80,687,664.86
  5. Step 5: Solve for x
    x = 80,687,664.86/9,891.28
  6. Step 6: Final answer
    x = 8,157.45

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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.