Home / 15,215.79-20,997.83-8,501.67

Finding the Fourth Proportional to 15,215.79, 20,997.83 and 8,501.67

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Solution

The fourth proportional to 15,215.79, 20,997.83 and 8,501.67 is: 11,732.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,215.79 : 20,997.83 = 8,501.67 : x
  2. Step 2: Convert to fraction form
    15,215.79/20,997.83 = 8,501.67/x
  3. Step 3: Cross multiply
    15,215.79x = 20,997.83 × 8,501.67
  4. Step 4: Simplify right side
    15,215.79x = 178,516,621.38
  5. Step 5: Solve for x
    x = 178,516,621.38/15,215.79
  6. Step 6: Final answer
    x = 11,732.33

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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.