Home / 13,716.20-18,928.44-7,428.58

Finding the Fourth Proportional to 13,716.20, 18,928.44 and 7,428.58

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Solution

The fourth proportional to 13,716.20, 18,928.44 and 7,428.58 is: 10,251.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,716.20 : 18,928.44 = 7,428.58 : x
  2. Step 2: Convert to fraction form
    13,716.20/18,928.44 = 7,428.58/x
  3. Step 3: Cross multiply
    13,716.20x = 18,928.44 × 7,428.58
  4. Step 4: Simplify right side
    13,716.20x = 140,611,430.82
  5. Step 5: Solve for x
    x = 140,611,430.82/13,716.20
  6. Step 6: Final answer
    x = 10,251.49

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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.