Home / 12,819.11-17,698.38-9,829.20

Finding the Fourth Proportional to 12,819.11, 17,698.38 and 9,829.20

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Solution

The fourth proportional to 12,819.11, 17,698.38 and 9,829.20 is: 13,570.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,819.11 : 17,698.38 = 9,829.20 : x
  2. Step 2: Convert to fraction form
    12,819.11/17,698.38 = 9,829.20/x
  3. Step 3: Cross multiply
    12,819.11x = 17,698.38 × 9,829.20
  4. Step 4: Simplify right side
    12,819.11x = 173,960,916.70
  5. Step 5: Solve for x
    x = 173,960,916.70/12,819.11
  6. Step 6: Final answer
    x = 13,570.44

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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.