Home / 21,281.10-29,367.65-11,720.81

Finding the Fourth Proportional to 21,281.10, 29,367.65 and 11,720.81

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Solution

The fourth proportional to 21,281.10, 29,367.65 and 11,720.81 is: 16,174.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,281.10 : 29,367.65 = 11,720.81 : x
  2. Step 2: Convert to fraction form
    21,281.10/29,367.65 = 11,720.81/x
  3. Step 3: Cross multiply
    21,281.10x = 29,367.65 × 11,720.81
  4. Step 4: Simplify right side
    21,281.10x = 344,212,440.35
  5. Step 5: Solve for x
    x = 344,212,440.35/21,281.10
  6. Step 6: Final answer
    x = 16,174.56

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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.