Home / 21,201.60-29,253.96-13,636.08

Finding the Fourth Proportional to 21,201.60, 29,253.96 and 13,636.08

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Solution

The fourth proportional to 21,201.60, 29,253.96 and 13,636.08 is: 18,815.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,201.60 : 29,253.96 = 13,636.08 : x
  2. Step 2: Convert to fraction form
    21,201.60/29,253.96 = 13,636.08/x
  3. Step 3: Cross multiply
    21,201.60x = 29,253.96 × 13,636.08
  4. Step 4: Simplify right side
    21,201.60x = 398,909,338.88
  5. Step 5: Solve for x
    x = 398,909,338.88/21,201.60
  6. Step 6: Final answer
    x = 18,815.06

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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.