Home / 13,215.11-19,783.78-8,821.67

Finding the Fourth Proportional to 13,215.11, 19,783.78 and 8,821.67

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Solution

The fourth proportional to 13,215.11, 19,783.78 and 8,821.67 is: 13,206.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,215.11 : 19,783.78 = 8,821.67 : x
  2. Step 2: Convert to fraction form
    13,215.11/19,783.78 = 8,821.67/x
  3. Step 3: Cross multiply
    13,215.11x = 19,783.78 × 8,821.67
  4. Step 4: Simplify right side
    13,215.11x = 174,526,005.92
  5. Step 5: Solve for x
    x = 174,526,005.92/13,215.11
  6. Step 6: Final answer
    x = 13,206.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.