Home / 12,478.50-17,220.33-6,889.86

Finding the Fourth Proportional to 12,478.50, 17,220.33 and 6,889.86

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Solution

The fourth proportional to 12,478.50, 17,220.33 and 6,889.86 is: 9,508.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,478.50 : 17,220.33 = 6,889.86 : x
  2. Step 2: Convert to fraction form
    12,478.50/17,220.33 = 6,889.86/x
  3. Step 3: Cross multiply
    12,478.50x = 17,220.33 × 6,889.86
  4. Step 4: Simplify right side
    12,478.50x = 118,645,662.85
  5. Step 5: Solve for x
    x = 118,645,662.85/12,478.50
  6. Step 6: Final answer
    x = 9,508.01

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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.