Home / 12,489.36-18,715.50-5,084.76

Finding the Fourth Proportional to 12,489.36, 18,715.50 and 5,084.76

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Solution

The fourth proportional to 12,489.36, 18,715.50 and 5,084.76 is: 7,619.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,489.36 : 18,715.50 = 5,084.76 : x
  2. Step 2: Convert to fraction form
    12,489.36/18,715.50 = 5,084.76/x
  3. Step 3: Cross multiply
    12,489.36x = 18,715.50 × 5,084.76
  4. Step 4: Simplify right side
    12,489.36x = 95,163,825.78
  5. Step 5: Solve for x
    x = 95,163,825.78/12,489.36
  6. Step 6: Final answer
    x = 7,619.59

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.