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Finding the Fourth Proportional to 21,987.63, 32,993.73 and 21,809.10

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Solution

The fourth proportional to 21,987.63, 32,993.73 and 21,809.10 is: 32,725.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,987.63 : 32,993.73 = 21,809.10 : x
  2. Step 2: Convert to fraction form
    21,987.63/32,993.73 = 21,809.10/x
  3. Step 3: Cross multiply
    21,987.63x = 32,993.73 × 21,809.10
  4. Step 4: Simplify right side
    21,987.63x = 719,563,556.94
  5. Step 5: Solve for x
    x = 719,563,556.94/21,987.63
  6. Step 6: Final answer
    x = 32,725.84

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1.5x scale

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.