Home / 21,288.64-29,385.14-13,735.19

Finding the Fourth Proportional to 21,288.64, 29,385.14 and 13,735.19

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Solution

The fourth proportional to 21,288.64, 29,385.14 and 13,735.19 is: 18,958.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,288.64 : 29,385.14 = 13,735.19 : x
  2. Step 2: Convert to fraction form
    21,288.64/29,385.14 = 13,735.19/x
  3. Step 3: Cross multiply
    21,288.64x = 29,385.14 × 13,735.19
  4. Step 4: Simplify right side
    21,288.64x = 403,610,481.08
  5. Step 5: Solve for x
    x = 403,610,481.08/21,288.64
  6. Step 6: Final answer
    x = 18,958.96

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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.