Home / 15,228.96-20,998.56-12,388.56

Finding the Fourth Proportional to 15,228.96, 20,998.56 and 12,388.56

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Solution

The fourth proportional to 15,228.96, 20,998.56 and 12,388.56 is: 17,082.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,228.96 : 20,998.56 = 12,388.56 : x
  2. Step 2: Convert to fraction form
    15,228.96/20,998.56 = 12,388.56/x
  3. Step 3: Cross multiply
    15,228.96x = 20,998.56 × 12,388.56
  4. Step 4: Simplify right side
    15,228.96x = 260,141,920.47
  5. Step 5: Solve for x
    x = 260,141,920.47/15,228.96
  6. Step 6: Final answer
    x = 17,082.05

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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.