Home / 21,081.08-31,637.94-7,945.40

Finding the Fourth Proportional to 21,081.08, 31,637.94 and 7,945.40

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Solution

The fourth proportional to 21,081.08, 31,637.94 and 7,945.40 is: 11,924.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,081.08 : 31,637.94 = 7,945.40 : x
  2. Step 2: Convert to fraction form
    21,081.08/31,637.94 = 7,945.40/x
  3. Step 3: Cross multiply
    21,081.08x = 31,637.94 × 7,945.40
  4. Step 4: Simplify right side
    21,081.08x = 251,376,088.48
  5. Step 5: Solve for x
    x = 251,376,088.48/21,081.08
  6. Step 6: Final answer
    x = 11,924.25

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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.