Home / 12,891.57-19,319.13-5,488.58

Finding the Fourth Proportional to 12,891.57, 19,319.13 and 5,488.58

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Solution

The fourth proportional to 12,891.57, 19,319.13 and 5,488.58 is: 8,225.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,891.57 : 19,319.13 = 5,488.58 : x
  2. Step 2: Convert to fraction form
    12,891.57/19,319.13 = 5,488.58/x
  3. Step 3: Cross multiply
    12,891.57x = 19,319.13 × 5,488.58
  4. Step 4: Simplify right side
    12,891.57x = 106,034,493.94
  5. Step 5: Solve for x
    x = 106,034,493.94/12,891.57
  6. Step 6: Final answer
    x = 8,225.10

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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.