Home / 9,921.60-13,687.20-5,936.16

Finding the Fourth Proportional to 9,921.60, 13,687.20 and 5,936.16

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Solution

The fourth proportional to 9,921.60, 13,687.20 and 5,936.16 is: 8,189.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,921.60 : 13,687.20 = 5,936.16 : x
  2. Step 2: Convert to fraction form
    9,921.60/13,687.20 = 5,936.16/x
  3. Step 3: Cross multiply
    9,921.60x = 13,687.20 × 5,936.16
  4. Step 4: Simplify right side
    9,921.60x = 81,249,409.15
  5. Step 5: Solve for x
    x = 81,249,409.15/9,921.60
  6. Step 6: Final answer
    x = 8,189.14

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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.