Home / 9,409.92-12,985.68-5,218.08

Finding the Fourth Proportional to 9,409.92, 12,985.68 and 5,218.08

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Solution

The fourth proportional to 9,409.92, 12,985.68 and 5,218.08 is: 7,200.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,409.92 : 12,985.68 = 5,218.08 : x
  2. Step 2: Convert to fraction form
    9,409.92/12,985.68 = 5,218.08/x
  3. Step 3: Cross multiply
    9,409.92x = 12,985.68 × 5,218.08
  4. Step 4: Simplify right side
    9,409.92x = 67,760,317.09
  5. Step 5: Solve for x
    x = 67,760,317.09/9,409.92
  6. Step 6: Final answer
    x = 7,200.95

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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.