Home / 12,718.18-19,078.99-5,320.91

Finding the Fourth Proportional to 12,718.18, 19,078.99 and 5,320.91

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Solution

The fourth proportional to 12,718.18, 19,078.99 and 5,320.91 is: 7,982.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,718.18 : 19,078.99 = 5,320.91 : x
  2. Step 2: Convert to fraction form
    12,718.18/19,078.99 = 5,320.91/x
  3. Step 3: Cross multiply
    12,718.18x = 19,078.99 × 5,320.91
  4. Step 4: Simplify right side
    12,718.18x = 101,517,545.69
  5. Step 5: Solve for x
    x = 101,517,545.69/12,718.18
  6. Step 6: Final answer
    x = 7,982.08

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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.