Home / 13,422.70-18,520.59-8,117.80

Finding the Fourth Proportional to 13,422.70, 18,520.59 and 8,117.80

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Solution

The fourth proportional to 13,422.70, 18,520.59 and 8,117.80 is: 11,200.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,422.70 : 18,520.59 = 8,117.80 : x
  2. Step 2: Convert to fraction form
    13,422.70/18,520.59 = 8,117.80/x
  3. Step 3: Cross multiply
    13,422.70x = 18,520.59 × 8,117.80
  4. Step 4: Simplify right side
    13,422.70x = 150,346,445.50
  5. Step 5: Solve for x
    x = 150,346,445.50/13,422.70
  6. Step 6: Final answer
    x = 11,200.91

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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.