Home / 13,511.52-20,164.80-13,161.60

Finding the Fourth Proportional to 13,511.52, 20,164.80 and 13,161.60

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Solution

The fourth proportional to 13,511.52, 20,164.80 and 13,161.60 is: 19,642.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,511.52 : 20,164.80 = 13,161.60 : x
  2. Step 2: Convert to fraction form
    13,511.52/20,164.80 = 13,161.60/x
  3. Step 3: Cross multiply
    13,511.52x = 20,164.80 × 13,161.60
  4. Step 4: Simplify right side
    13,511.52x = 265,401,031.68
  5. Step 5: Solve for x
    x = 265,401,031.68/13,511.52
  6. Step 6: Final answer
    x = 19,642.57

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.