Home / 21,145.15-31,714.98-7,995.81

Finding the Fourth Proportional to 21,145.15, 31,714.98 and 7,995.81

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Solution

The fourth proportional to 21,145.15, 31,714.98 and 7,995.81 is: 11,992.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,145.15 : 31,714.98 = 7,995.81 : x
  2. Step 2: Convert to fraction form
    21,145.15/31,714.98 = 7,995.81/x
  3. Step 3: Cross multiply
    21,145.15x = 31,714.98 × 7,995.81
  4. Step 4: Simplify right side
    21,145.15x = 253,587,043.18
  5. Step 5: Solve for x
    x = 253,587,043.18/21,145.15
  6. Step 6: Final answer
    x = 11,992.68

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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.