Home / 21,005.86-31,514.15-6,969.80

Finding the Fourth Proportional to 21,005.86, 31,514.15 and 6,969.80

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Solution

The fourth proportional to 21,005.86, 31,514.15 and 6,969.80 is: 10,456.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,005.86 : 31,514.15 = 6,969.80 : x
  2. Step 2: Convert to fraction form
    21,005.86/31,514.15 = 6,969.80/x
  3. Step 3: Cross multiply
    21,005.86x = 31,514.15 × 6,969.80
  4. Step 4: Simplify right side
    21,005.86x = 219,647,322.67
  5. Step 5: Solve for x
    x = 219,647,322.67/21,005.86
  6. Step 6: Final answer
    x = 10,456.48

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1.5x scale

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.