Home / 21,110-29,134.56-12,157.88

Finding the Fourth Proportional to 21,110, 29,134.56 and 12,157.88

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Solution

The fourth proportional to 21,110, 29,134.56 and 12,157.88 is: 16,779.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,110 : 29,134.56 = 12,157.88 : x
  2. Step 2: Convert to fraction form
    21,110/29,134.56 = 12,157.88/x
  3. Step 3: Cross multiply
    21,110x = 29,134.56 × 12,157.88
  4. Step 4: Simplify right side
    21,110x = 354,214,484.33
  5. Step 5: Solve for x
    x = 354,214,484.33/21,110
  6. Step 6: Final answer
    x = 16,779.46

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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.