Home / 9,991.72-13,770.30-6,628.60

Finding the Fourth Proportional to 9,991.72, 13,770.30 and 6,628.60

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Solution

The fourth proportional to 9,991.72, 13,770.30 and 6,628.60 is: 9,135.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,991.72 : 13,770.30 = 6,628.60 : x
  2. Step 2: Convert to fraction form
    9,991.72/13,770.30 = 6,628.60/x
  3. Step 3: Cross multiply
    9,991.72x = 13,770.30 × 6,628.60
  4. Step 4: Simplify right side
    9,991.72x = 91,277,810.58
  5. Step 5: Solve for x
    x = 91,277,810.58/9,991.72
  6. Step 6: Final answer
    x = 9,135.35

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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.