Home / 21,098.21-31,637.52-7,767.81

Finding the Fourth Proportional to 21,098.21, 31,637.52 and 7,767.81

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Solution

The fourth proportional to 21,098.21, 31,637.52 and 7,767.81 is: 11,648.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,098.21 : 31,637.52 = 7,767.81 : x
  2. Step 2: Convert to fraction form
    21,098.21/31,637.52 = 7,767.81/x
  3. Step 3: Cross multiply
    21,098.21x = 31,637.52 × 7,767.81
  4. Step 4: Simplify right side
    21,098.21x = 245,754,244.23
  5. Step 5: Solve for x
    x = 245,754,244.23/21,098.21
  6. Step 6: Final answer
    x = 11,648.11

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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.