Home / 11,320.40-16,980.62-6,394.20

Finding the Fourth Proportional to 11,320.40, 16,980.62 and 6,394.20

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Solution

The fourth proportional to 11,320.40, 16,980.62 and 6,394.20 is: 9,591.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,320.40 : 16,980.62 = 6,394.20 : x
  2. Step 2: Convert to fraction form
    11,320.40/16,980.62 = 6,394.20/x
  3. Step 3: Cross multiply
    11,320.40x = 16,980.62 × 6,394.20
  4. Step 4: Simplify right side
    11,320.40x = 108,577,448.43
  5. Step 5: Solve for x
    x = 108,577,448.43/11,320.40
  6. Step 6: Final answer
    x = 9,591.31

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.