Home / 15,635.45-21,576.89-8,561.81

Finding the Fourth Proportional to 15,635.45, 21,576.89 and 8,561.81

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Solution

The fourth proportional to 15,635.45, 21,576.89 and 8,561.81 is: 11,815.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,635.45 : 21,576.89 = 8,561.81 : x
  2. Step 2: Convert to fraction form
    15,635.45/21,576.89 = 8,561.81/x
  3. Step 3: Cross multiply
    15,635.45x = 21,576.89 × 8,561.81
  4. Step 4: Simplify right side
    15,635.45x = 184,737,189.76
  5. Step 5: Solve for x
    x = 184,737,189.76/15,635.45
  6. Step 6: Final answer
    x = 11,815.28

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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.