Home / 12,815.32-19,219.12-6,888.56

Finding the Fourth Proportional to 12,815.32, 19,219.12 and 6,888.56

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Solution

The fourth proportional to 12,815.32, 19,219.12 and 6,888.56 is: 10,330.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,815.32 : 19,219.12 = 6,888.56 : x
  2. Step 2: Convert to fraction form
    12,815.32/19,219.12 = 6,888.56/x
  3. Step 3: Cross multiply
    12,815.32x = 19,219.12 × 6,888.56
  4. Step 4: Simplify right side
    12,815.32x = 132,392,061.27
  5. Step 5: Solve for x
    x = 132,392,061.27/12,815.32
  6. Step 6: Final answer
    x = 10,330.77

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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.