Home / 12,986.60-17,917.20-7,320.65

Finding the Fourth Proportional to 12,986.60, 17,917.20 and 7,320.65

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Solution

The fourth proportional to 12,986.60, 17,917.20 and 7,320.65 is: 10,100.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,986.60 : 17,917.20 = 7,320.65 : x
  2. Step 2: Convert to fraction form
    12,986.60/17,917.20 = 7,320.65/x
  3. Step 3: Cross multiply
    12,986.60x = 17,917.20 × 7,320.65
  4. Step 4: Simplify right side
    12,986.60x = 131,165,550.18
  5. Step 5: Solve for x
    x = 131,165,550.18/12,986.60
  6. Step 6: Final answer
    x = 10,100.07

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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.