Home / 21,239.54-29,311.32-11,680.16

Finding the Fourth Proportional to 21,239.54, 29,311.32 and 11,680.16

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Solution

The fourth proportional to 21,239.54, 29,311.32 and 11,680.16 is: 16,119.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,239.54 : 29,311.32 = 11,680.16 : x
  2. Step 2: Convert to fraction form
    21,239.54/29,311.32 = 11,680.16/x
  3. Step 3: Cross multiply
    21,239.54x = 29,311.32 × 11,680.16
  4. Step 4: Simplify right side
    21,239.54x = 342,360,702.45
  5. Step 5: Solve for x
    x = 342,360,702.45/21,239.54
  6. Step 6: Final answer
    x = 16,119.03

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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.