Home / 21,210.22-31,772.91-12,772.05

Finding the Fourth Proportional to 21,210.22, 31,772.91 and 12,772.05

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Solution

The fourth proportional to 21,210.22, 31,772.91 and 12,772.05 is: 19,132.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,210.22 : 31,772.91 = 12,772.05 : x
  2. Step 2: Convert to fraction form
    21,210.22/31,772.91 = 12,772.05/x
  3. Step 3: Cross multiply
    21,210.22x = 31,772.91 × 12,772.05
  4. Step 4: Simplify right side
    21,210.22x = 405,805,052.07
  5. Step 5: Solve for x
    x = 405,805,052.07/21,210.22
  6. Step 6: Final answer
    x = 19,132.52

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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.