Home / 21,210.81-31,828.17-19,537.76

Finding the Fourth Proportional to 21,210.81, 31,828.17 and 19,537.76

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Solution

The fourth proportional to 21,210.81, 31,828.17 and 19,537.76 is: 29,317.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,210.81 : 31,828.17 = 19,537.76 : x
  2. Step 2: Convert to fraction form
    21,210.81/31,828.17 = 19,537.76/x
  3. Step 3: Cross multiply
    21,210.81x = 31,828.17 × 19,537.76
  4. Step 4: Simplify right side
    21,210.81x = 621,850,987.56
  5. Step 5: Solve for x
    x = 621,850,987.56/21,210.81
  6. Step 6: Final answer
    x = 29,317.64

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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.