Home / 13,715.92-18,928.01-7,428.30

Finding the Fourth Proportional to 13,715.92, 18,928.01 and 7,428.30

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Solution

The fourth proportional to 13,715.92, 18,928.01 and 7,428.30 is: 10,251.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,715.92 : 18,928.01 = 7,428.30 : x
  2. Step 2: Convert to fraction form
    13,715.92/18,928.01 = 7,428.30/x
  3. Step 3: Cross multiply
    13,715.92x = 18,928.01 × 7,428.30
  4. Step 4: Simplify right side
    13,715.92x = 140,602,936.68
  5. Step 5: Solve for x
    x = 140,602,936.68/13,715.92
  6. Step 6: Final answer
    x = 10,251.08

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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.