Home / 13,291.28-18,336.74-11,612.75

Finding the Fourth Proportional to 13,291.28, 18,336.74 and 11,612.75

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Solution

The fourth proportional to 13,291.28, 18,336.74 and 11,612.75 is: 16,021.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,291.28 : 18,336.74 = 11,612.75 : x
  2. Step 2: Convert to fraction form
    13,291.28/18,336.74 = 11,612.75/x
  3. Step 3: Cross multiply
    13,291.28x = 18,336.74 × 11,612.75
  4. Step 4: Simplify right side
    13,291.28x = 212,939,965.21
  5. Step 5: Solve for x
    x = 212,939,965.21/13,291.28
  6. Step 6: Final answer
    x = 16,021.03

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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.