Home / 13,215.90-18,228.42-8,495.67

Finding the Fourth Proportional to 13,215.90, 18,228.42 and 8,495.67

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Solution

The fourth proportional to 13,215.90, 18,228.42 and 8,495.67 is: 11,717.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,215.90 : 18,228.42 = 8,495.67 : x
  2. Step 2: Convert to fraction form
    13,215.90/18,228.42 = 8,495.67/x
  3. Step 3: Cross multiply
    13,215.90x = 18,228.42 × 8,495.67
  4. Step 4: Simplify right side
    13,215.90x = 154,862,640.94
  5. Step 5: Solve for x
    x = 154,862,640.94/13,215.90
  6. Step 6: Final answer
    x = 11,717.90

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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.