Home / 9,980.62-13,778.88-6,628.02

Finding the Fourth Proportional to 9,980.62, 13,778.88 and 6,628.02

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Solution

The fourth proportional to 9,980.62, 13,778.88 and 6,628.02 is: 9,150.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,980.62 : 13,778.88 = 6,628.02 : x
  2. Step 2: Convert to fraction form
    9,980.62/13,778.88 = 6,628.02/x
  3. Step 3: Cross multiply
    9,980.62x = 13,778.88 × 6,628.02
  4. Step 4: Simplify right side
    9,980.62x = 91,326,692.22
  5. Step 5: Solve for x
    x = 91,326,692.22/9,980.62
  6. Step 6: Final answer
    x = 9,150.40

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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.