Home / 21,054.66-31,585.32-7,908.03

Finding the Fourth Proportional to 21,054.66, 31,585.32 and 7,908.03

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Solution

The fourth proportional to 21,054.66, 31,585.32 and 7,908.03 is: 11,863.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,054.66 : 31,585.32 = 7,908.03 : x
  2. Step 2: Convert to fraction form
    21,054.66/31,585.32 = 7,908.03/x
  3. Step 3: Cross multiply
    21,054.66x = 31,585.32 × 7,908.03
  4. Step 4: Simplify right side
    21,054.66x = 249,777,658.12
  5. Step 5: Solve for x
    x = 249,777,658.12/21,054.66
  6. Step 6: Final answer
    x = 11,863.30

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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.