Home / 8,945.91-12,345.21-5,409.18

Finding the Fourth Proportional to 8,945.91, 12,345.21 and 5,409.18

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Solution

The fourth proportional to 8,945.91, 12,345.21 and 5,409.18 is: 7,464.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,945.91 : 12,345.21 = 5,409.18 : x
  2. Step 2: Convert to fraction form
    8,945.91/12,345.21 = 5,409.18/x
  3. Step 3: Cross multiply
    8,945.91x = 12,345.21 × 5,409.18
  4. Step 4: Simplify right side
    8,945.91x = 66,777,463.03
  5. Step 5: Solve for x
    x = 66,777,463.03/8,945.91
  6. Step 6: Final answer
    x = 7,464.58

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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.