Home / 13,716.12-18,928.17-7,428.45

Finding the Fourth Proportional to 13,716.12, 18,928.17 and 7,428.45

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Solution

The fourth proportional to 13,716.12, 18,928.17 and 7,428.45 is: 10,251.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,716.12 : 18,928.17 = 7,428.45 : x
  2. Step 2: Convert to fraction form
    13,716.12/18,928.17 = 7,428.45/x
  3. Step 3: Cross multiply
    13,716.12x = 18,928.17 × 7,428.45
  4. Step 4: Simplify right side
    13,716.12x = 140,606,964.44
  5. Step 5: Solve for x
    x = 140,606,964.44/13,716.12
  6. Step 6: Final answer
    x = 10,251.22

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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.