Home / 13,715.75-18,927.68-7,428.13

Finding the Fourth Proportional to 13,715.75, 18,927.68 and 7,428.13

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Solution

The fourth proportional to 13,715.75, 18,927.68 and 7,428.13 is: 10,250.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,715.75 : 18,927.68 = 7,428.13 : x
  2. Step 2: Convert to fraction form
    13,715.75/18,927.68 = 7,428.13/x
  3. Step 3: Cross multiply
    13,715.75x = 18,927.68 × 7,428.13
  4. Step 4: Simplify right side
    13,715.75x = 140,597,183.18
  5. Step 5: Solve for x
    x = 140,597,183.18/13,715.75
  6. Step 6: Final answer
    x = 10,250.78

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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.