Home / 21,579.53-29,779.80-12,019.34

Finding the Fourth Proportional to 21,579.53, 29,779.80 and 12,019.34

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Solution

The fourth proportional to 21,579.53, 29,779.80 and 12,019.34 is: 16,586.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,579.53 : 29,779.80 = 12,019.34 : x
  2. Step 2: Convert to fraction form
    21,579.53/29,779.80 = 12,019.34/x
  3. Step 3: Cross multiply
    21,579.53x = 29,779.80 × 12,019.34
  4. Step 4: Simplify right side
    21,579.53x = 357,933,541.33
  5. Step 5: Solve for x
    x = 357,933,541.33/21,579.53
  6. Step 6: Final answer
    x = 16,586.72

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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.