Home / 13,719.40-18,919.78-9,967.40

Finding the Fourth Proportional to 13,719.40, 18,919.78 and 9,967.40

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Solution

The fourth proportional to 13,719.40, 18,919.78 and 9,967.40 is: 13,745.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,719.40 : 18,919.78 = 9,967.40 : x
  2. Step 2: Convert to fraction form
    13,719.40/18,919.78 = 9,967.40/x
  3. Step 3: Cross multiply
    13,719.40x = 18,919.78 × 9,967.40
  4. Step 4: Simplify right side
    13,719.40x = 188,581,015.17
  5. Step 5: Solve for x
    x = 188,581,015.17/13,719.40
  6. Step 6: Final answer
    x = 13,745.57

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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.