Home / 13,724.64-18,941.40-8,689.14

Finding the Fourth Proportional to 13,724.64, 18,941.40 and 8,689.14

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Solution

The fourth proportional to 13,724.64, 18,941.40 and 8,689.14 is: 11,991.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,724.64 : 18,941.40 = 8,689.14 : x
  2. Step 2: Convert to fraction form
    13,724.64/18,941.40 = 8,689.14/x
  3. Step 3: Cross multiply
    13,724.64x = 18,941.40 × 8,689.14
  4. Step 4: Simplify right side
    13,724.64x = 164,584,476.40
  5. Step 5: Solve for x
    x = 164,584,476.40/13,724.64
  6. Step 6: Final answer
    x = 11,991.90

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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.