Home / 13,716.34-18,928.51-7,428.70

Finding the Fourth Proportional to 13,716.34, 18,928.51 and 7,428.70

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Solution

The fourth proportional to 13,716.34, 18,928.51 and 7,428.70 is: 10,251.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,716.34 : 18,928.51 = 7,428.70 : x
  2. Step 2: Convert to fraction form
    13,716.34/18,928.51 = 7,428.70/x
  3. Step 3: Cross multiply
    13,716.34x = 18,928.51 × 7,428.70
  4. Step 4: Simplify right side
    13,716.34x = 140,614,222.24
  5. Step 5: Solve for x
    x = 140,614,222.24/13,716.34
  6. Step 6: Final answer
    x = 10,251.58

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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.