Home / 21,107.06-29,125.22-12,157.47

Finding the Fourth Proportional to 21,107.06, 29,125.22 and 12,157.47

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Solution

The fourth proportional to 21,107.06, 29,125.22 and 12,157.47 is: 16,775.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,107.06 : 29,125.22 = 12,157.47 : x
  2. Step 2: Convert to fraction form
    21,107.06/29,125.22 = 12,157.47/x
  3. Step 3: Cross multiply
    21,107.06x = 29,125.22 × 12,157.47
  4. Step 4: Simplify right side
    21,107.06x = 354,089,036.83
  5. Step 5: Solve for x
    x = 354,089,036.83/21,107.06
  6. Step 6: Final answer
    x = 16,775.86

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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.