Home / 8,980.12-12,390.66-5,203.08

Finding the Fourth Proportional to 8,980.12, 12,390.66 and 5,203.08

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Solution

The fourth proportional to 8,980.12, 12,390.66 and 5,203.08 is: 7,179.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,980.12 : 12,390.66 = 5,203.08 : x
  2. Step 2: Convert to fraction form
    8,980.12/12,390.66 = 5,203.08/x
  3. Step 3: Cross multiply
    8,980.12x = 12,390.66 × 5,203.08
  4. Step 4: Simplify right side
    8,980.12x = 64,469,595.23
  5. Step 5: Solve for x
    x = 64,469,595.23/8,980.12
  6. Step 6: Final answer
    x = 7,179.15

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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.