Home / 21,161.70-29,336.84-20,038.16

Finding the Fourth Proportional to 21,161.70, 29,336.84 and 20,038.16

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Solution

The fourth proportional to 21,161.70, 29,336.84 and 20,038.16 is: 27,779.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,161.70 : 29,336.84 = 20,038.16 : x
  2. Step 2: Convert to fraction form
    21,161.70/29,336.84 = 20,038.16/x
  3. Step 3: Cross multiply
    21,161.70x = 29,336.84 × 20,038.16
  4. Step 4: Simplify right side
    21,161.70x = 587,856,293.81
  5. Step 5: Solve for x
    x = 587,856,293.81/21,161.70
  6. Step 6: Final answer
    x = 27,779.26

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.