Home / 21,152.12-29,188.32-11,720.48

Finding the Fourth Proportional to 21,152.12, 29,188.32 and 11,720.48

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Solution

The fourth proportional to 21,152.12, 29,188.32 and 11,720.48 is: 16,173.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,152.12 : 29,188.32 = 11,720.48 : x
  2. Step 2: Convert to fraction form
    21,152.12/29,188.32 = 11,720.48/x
  3. Step 3: Cross multiply
    21,152.12x = 29,188.32 × 11,720.48
  4. Step 4: Simplify right side
    21,152.12x = 342,101,120.79
  5. Step 5: Solve for x
    x = 342,101,120.79/21,152.12
  6. Step 6: Final answer
    x = 16,173.37

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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.