Home / 13,139.58-19,717.83-5,240.75

Finding the Fourth Proportional to 13,139.58, 19,717.83 and 5,240.75

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Solution

The fourth proportional to 13,139.58, 19,717.83 and 5,240.75 is: 7,864.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,139.58 : 19,717.83 = 5,240.75 : x
  2. Step 2: Convert to fraction form
    13,139.58/19,717.83 = 5,240.75/x
  3. Step 3: Cross multiply
    13,139.58x = 19,717.83 × 5,240.75
  4. Step 4: Simplify right side
    13,139.58x = 103,336,229.90
  5. Step 5: Solve for x
    x = 103,336,229.90/13,139.58
  6. Step 6: Final answer
    x = 7,864.50

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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.