Home / 15,666.91-21,620.79-8,593.78

Finding the Fourth Proportional to 15,666.91, 21,620.79 and 8,593.78

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Solution

The fourth proportional to 15,666.91, 21,620.79 and 8,593.78 is: 11,859.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,666.91 : 21,620.79 = 8,593.78 : x
  2. Step 2: Convert to fraction form
    15,666.91/21,620.79 = 8,593.78/x
  3. Step 3: Cross multiply
    15,666.91x = 21,620.79 × 8,593.78
  4. Step 4: Simplify right side
    15,666.91x = 185,804,312.69
  5. Step 5: Solve for x
    x = 185,804,312.69/15,666.91
  6. Step 6: Final answer
    x = 11,859.67

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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.