Home / 21,679.55-29,917.60-15,228.26

Finding the Fourth Proportional to 21,679.55, 29,917.60 and 15,228.26

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Solution

The fourth proportional to 21,679.55, 29,917.60 and 15,228.26 is: 21,014.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,679.55 : 29,917.60 = 15,228.26 : x
  2. Step 2: Convert to fraction form
    21,679.55/29,917.60 = 15,228.26/x
  3. Step 3: Cross multiply
    21,679.55x = 29,917.60 × 15,228.26
  4. Step 4: Simplify right side
    21,679.55x = 455,592,765.65
  5. Step 5: Solve for x
    x = 455,592,765.65/21,679.55
  6. Step 6: Final answer
    x = 21,014.86

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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.