Home / 13,716.49-18,928.76-7,428.87

Finding the Fourth Proportional to 13,716.49, 18,928.76 and 7,428.87

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Solution

The fourth proportional to 13,716.49, 18,928.76 and 7,428.87 is: 10,251.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,716.49 : 18,928.76 = 7,428.87 : x
  2. Step 2: Convert to fraction form
    13,716.49/18,928.76 = 7,428.87/x
  3. Step 3: Cross multiply
    13,716.49x = 18,928.76 × 7,428.87
  4. Step 4: Simplify right side
    13,716.49x = 140,619,248.71
  5. Step 5: Solve for x
    x = 140,619,248.71/13,716.49
  6. Step 6: Final answer
    x = 10,251.84

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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.