Home / 21,428.09-29,585.37-13,364.88

Finding the Fourth Proportional to 21,428.09, 29,585.37 and 13,364.88

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Solution

The fourth proportional to 21,428.09, 29,585.37 and 13,364.88 is: 18,452.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,428.09 : 29,585.37 = 13,364.88 : x
  2. Step 2: Convert to fraction form
    21,428.09/29,585.37 = 13,364.88/x
  3. Step 3: Cross multiply
    21,428.09x = 29,585.37 × 13,364.88
  4. Step 4: Simplify right side
    21,428.09x = 395,404,919.81
  5. Step 5: Solve for x
    x = 395,404,919.81/21,428.09
  6. Step 6: Final answer
    x = 18,452.65

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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.