Home / 21,860.57-30,169.23-13,364.30

Finding the Fourth Proportional to 21,860.57, 30,169.23 and 13,364.30

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Solution

The fourth proportional to 21,860.57, 30,169.23 and 13,364.30 is: 18,443.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,860.57 : 30,169.23 = 13,364.30 : x
  2. Step 2: Convert to fraction form
    21,860.57/30,169.23 = 13,364.30/x
  3. Step 3: Cross multiply
    21,860.57x = 30,169.23 × 13,364.30
  4. Step 4: Simplify right side
    21,860.57x = 403,190,489.64
  5. Step 5: Solve for x
    x = 403,190,489.64/21,860.57
  6. Step 6: Final answer
    x = 18,443.74

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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.