Home / 21,579.53-29,779.70-12,148.11

Finding the Fourth Proportional to 21,579.53, 29,779.70 and 12,148.11

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Solution

The fourth proportional to 21,579.53, 29,779.70 and 12,148.11 is: 16,764.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,579.53 : 29,779.70 = 12,148.11 : x
  2. Step 2: Convert to fraction form
    21,579.53/29,779.70 = 12,148.11/x
  3. Step 3: Cross multiply
    21,579.53x = 29,779.70 × 12,148.11
  4. Step 4: Simplify right side
    21,579.53x = 361,767,010.63
  5. Step 5: Solve for x
    x = 361,767,010.63/21,579.53
  6. Step 6: Final answer
    x = 16,764.36

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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.