Home / 8,919.91-12,309.34-5,143.08

Finding the Fourth Proportional to 8,919.91, 12,309.34 and 5,143.08

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Solution

The fourth proportional to 8,919.91, 12,309.34 and 5,143.08 is: 7,097.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,919.91 : 12,309.34 = 5,143.08 : x
  2. Step 2: Convert to fraction form
    8,919.91/12,309.34 = 5,143.08/x
  3. Step 3: Cross multiply
    8,919.91x = 12,309.34 × 5,143.08
  4. Step 4: Simplify right side
    8,919.91x = 63,307,920.37
  5. Step 5: Solve for x
    x = 63,307,920.37/8,919.91
  6. Step 6: Final answer
    x = 7,097.37

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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.