Home / 15,145.79-20,900.57-8,431.56

Finding the Fourth Proportional to 15,145.79, 20,900.57 and 8,431.56

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Solution

The fourth proportional to 15,145.79, 20,900.57 and 8,431.56 is: 11,635.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,145.79 : 20,900.57 = 8,431.56 : x
  2. Step 2: Convert to fraction form
    15,145.79/20,900.57 = 8,431.56/x
  3. Step 3: Cross multiply
    15,145.79x = 20,900.57 × 8,431.56
  4. Step 4: Simplify right side
    15,145.79x = 176,224,367.83
  5. Step 5: Solve for x
    x = 176,224,367.83/15,145.79
  6. Step 6: Final answer
    x = 11,635.21

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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.