Home / 19,380.15-26,748.09-11,421.90

Finding the Fourth Proportional to 19,380.15, 26,748.09 and 11,421.90

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Solution

The fourth proportional to 19,380.15, 26,748.09 and 11,421.90 is: 15,764.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,380.15 : 26,748.09 = 11,421.90 : x
  2. Step 2: Convert to fraction form
    19,380.15/26,748.09 = 11,421.90/x
  3. Step 3: Cross multiply
    19,380.15x = 26,748.09 × 11,421.90
  4. Step 4: Simplify right side
    19,380.15x = 305,514,009.17
  5. Step 5: Solve for x
    x = 305,514,009.17/19,380.15
  6. Step 6: Final answer
    x = 15,764.27

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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.