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Finding the Fourth Proportional to 21,095.66, 31,645.65 and 7,959.08

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Solution

The fourth proportional to 21,095.66, 31,645.65 and 7,959.08 is: 11,939.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,095.66 : 31,645.65 = 7,959.08 : x
  2. Step 2: Convert to fraction form
    21,095.66/31,645.65 = 7,959.08/x
  3. Step 3: Cross multiply
    21,095.66x = 31,645.65 × 7,959.08
  4. Step 4: Simplify right side
    21,095.66x = 251,870,260.00
  5. Step 5: Solve for x
    x = 251,870,260.00/21,095.66
  6. Step 6: Final answer
    x = 11,939.43

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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.