Home / 13,724.32-18,938.16-8,419.36

Finding the Fourth Proportional to 13,724.32, 18,938.16 and 8,419.36

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Solution

The fourth proportional to 13,724.32, 18,938.16 and 8,419.36 is: 11,617.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,724.32 : 18,938.16 = 8,419.36 : x
  2. Step 2: Convert to fraction form
    13,724.32/18,938.16 = 8,419.36/x
  3. Step 3: Cross multiply
    13,724.32x = 18,938.16 × 8,419.36
  4. Step 4: Simplify right side
    13,724.32x = 159,447,186.78
  5. Step 5: Solve for x
    x = 159,447,186.78/13,724.32
  6. Step 6: Final answer
    x = 11,617.86

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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.