Home / 21,242.43-29,314.71-13,289.18

Finding the Fourth Proportional to 21,242.43, 29,314.71 and 13,289.18

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Solution

The fourth proportional to 21,242.43, 29,314.71 and 13,289.18 is: 18,339.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,242.43 : 29,314.71 = 13,289.18 : x
  2. Step 2: Convert to fraction form
    21,242.43/29,314.71 = 13,289.18/x
  3. Step 3: Cross multiply
    21,242.43x = 29,314.71 × 13,289.18
  4. Step 4: Simplify right side
    21,242.43x = 389,568,311.26
  5. Step 5: Solve for x
    x = 389,568,311.26/21,242.43
  6. Step 6: Final answer
    x = 18,339.16

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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.