Home / 15,638.45-21,581.13-8,564.87

Finding the Fourth Proportional to 15,638.45, 21,581.13 and 8,564.87

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Solution

The fourth proportional to 15,638.45, 21,581.13 and 8,564.87 is: 11,819.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,638.45 : 21,581.13 = 8,564.87 : x
  2. Step 2: Convert to fraction form
    15,638.45/21,581.13 = 8,564.87/x
  3. Step 3: Cross multiply
    15,638.45x = 21,581.13 × 8,564.87
  4. Step 4: Simplify right side
    15,638.45x = 184,839,658.97
  5. Step 5: Solve for x
    x = 184,839,658.97/15,638.45
  6. Step 6: Final answer
    x = 11,819.56

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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.