Home / 13,515.11-18,649.61-8,735.20

Finding the Fourth Proportional to 13,515.11, 18,649.61 and 8,735.20

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Solution

The fourth proportional to 13,515.11, 18,649.61 and 8,735.20 is: 12,053.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,515.11 : 18,649.61 = 8,735.20 : x
  2. Step 2: Convert to fraction form
    13,515.11/18,649.61 = 8,735.20/x
  3. Step 3: Cross multiply
    13,515.11x = 18,649.61 × 8,735.20
  4. Step 4: Simplify right side
    13,515.11x = 162,908,015.73
  5. Step 5: Solve for x
    x = 162,908,015.73/13,515.11
  6. Step 6: Final answer
    x = 12,053.77

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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.