Home / 9,989.12-13,784.96-5,512.88

Finding the Fourth Proportional to 9,989.12, 13,784.96 and 5,512.88

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Solution

The fourth proportional to 9,989.12, 13,784.96 and 5,512.88 is: 7,607.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,989.12 : 13,784.96 = 5,512.88 : x
  2. Step 2: Convert to fraction form
    9,989.12/13,784.96 = 5,512.88/x
  3. Step 3: Cross multiply
    9,989.12x = 13,784.96 × 5,512.88
  4. Step 4: Simplify right side
    9,989.12x = 75,994,830.28
  5. Step 5: Solve for x
    x = 75,994,830.28/9,989.12
  6. Step 6: Final answer
    x = 7,607.76

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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.