Home / 15,516.56-21,406.21-12,145.85

Finding the Fourth Proportional to 15,516.56, 21,406.21 and 12,145.85

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Solution

The fourth proportional to 15,516.56, 21,406.21 and 12,145.85 is: 16,756.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,516.56 : 21,406.21 = 12,145.85 : x
  2. Step 2: Convert to fraction form
    15,516.56/21,406.21 = 12,145.85/x
  3. Step 3: Cross multiply
    15,516.56x = 21,406.21 × 12,145.85
  4. Step 4: Simplify right side
    15,516.56x = 259,996,558.61
  5. Step 5: Solve for x
    x = 259,996,558.61/15,516.56
  6. Step 6: Final answer
    x = 16,756.07

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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.