Home / 13,456.90-18,579.66-8,423.15

Finding the Fourth Proportional to 13,456.90, 18,579.66 and 8,423.15

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Solution

The fourth proportional to 13,456.90, 18,579.66 and 8,423.15 is: 11,629.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,456.90 : 18,579.66 = 8,423.15 : x
  2. Step 2: Convert to fraction form
    13,456.90/18,579.66 = 8,423.15/x
  3. Step 3: Cross multiply
    13,456.90x = 18,579.66 × 8,423.15
  4. Step 4: Simplify right side
    13,456.90x = 156,499,263.13
  5. Step 5: Solve for x
    x = 156,499,263.13/13,456.90
  6. Step 6: Final answer
    x = 11,629.67

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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.