Home / 12,815.68-17,686.56-7,508.56

Finding the Fourth Proportional to 12,815.68, 17,686.56 and 7,508.56

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Solution

The fourth proportional to 12,815.68, 17,686.56 and 7,508.56 is: 10,362.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,815.68 : 17,686.56 = 7,508.56 : x
  2. Step 2: Convert to fraction form
    12,815.68/17,686.56 = 7,508.56/x
  3. Step 3: Cross multiply
    12,815.68x = 17,686.56 × 7,508.56
  4. Step 4: Simplify right side
    12,815.68x = 132,800,596.95
  5. Step 5: Solve for x
    x = 132,800,596.95/12,815.68
  6. Step 6: Final answer
    x = 10,362.35

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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.