Home / 21,036.16-31,546.03-7,881.36

Finding the Fourth Proportional to 21,036.16, 31,546.03 and 7,881.36

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Solution

The fourth proportional to 21,036.16, 31,546.03 and 7,881.36 is: 11,818.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,036.16 : 31,546.03 = 7,881.36 : x
  2. Step 2: Convert to fraction form
    21,036.16/31,546.03 = 7,881.36/x
  3. Step 3: Cross multiply
    21,036.16x = 31,546.03 × 7,881.36
  4. Step 4: Simplify right side
    21,036.16x = 248,625,619.00
  5. Step 5: Solve for x
    x = 248,625,619.00/21,036.16
  6. Step 6: Final answer
    x = 11,818.96

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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.