Home / 21,132.86-31,704.56-6,342.05

Finding the Fourth Proportional to 21,132.86, 31,704.56 and 6,342.05

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Solution

The fourth proportional to 21,132.86, 31,704.56 and 6,342.05 is: 9,514.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,132.86 : 31,704.56 = 6,342.05 : x
  2. Step 2: Convert to fraction form
    21,132.86/31,704.56 = 6,342.05/x
  3. Step 3: Cross multiply
    21,132.86x = 31,704.56 × 6,342.05
  4. Step 4: Simplify right side
    21,132.86x = 201,071,714.51
  5. Step 5: Solve for x
    x = 201,071,714.51/21,132.86
  6. Step 6: Final answer
    x = 9,514.65

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.