Home / 21,271.48-29,331.66-20,787.64

Finding the Fourth Proportional to 21,271.48, 29,331.66 and 20,787.64

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Solution

The fourth proportional to 21,271.48, 29,331.66 and 20,787.64 is: 28,664.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,271.48 : 29,331.66 = 20,787.64 : x
  2. Step 2: Convert to fraction form
    21,271.48/29,331.66 = 20,787.64/x
  3. Step 3: Cross multiply
    21,271.48x = 29,331.66 × 20,787.64
  4. Step 4: Simplify right side
    21,271.48x = 609,735,988.68
  5. Step 5: Solve for x
    x = 609,735,988.68/21,271.48
  6. Step 6: Final answer
    x = 28,664.48

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.