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Finding the Fourth Proportional to 21,251.08, 29,310.01 and 13,698.64

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Solution

The fourth proportional to 21,251.08, 29,310.01 and 13,698.64 is: 18,893.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,251.08 : 29,310.01 = 13,698.64 : x
  2. Step 2: Convert to fraction form
    21,251.08/29,310.01 = 13,698.64/x
  3. Step 3: Cross multiply
    21,251.08x = 29,310.01 × 13,698.64
  4. Step 4: Simplify right side
    21,251.08x = 401,507,275.39
  5. Step 5: Solve for x
    x = 401,507,275.39/21,251.08
  6. Step 6: Final answer
    x = 18,893.50

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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.