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Finding the Fourth Proportional to 21,788.48, 32,682.72 and 5,372.48

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Solution

The fourth proportional to 21,788.48, 32,682.72 and 5,372.48 is: 8,058.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,788.48 : 32,682.72 = 5,372.48 : x
  2. Step 2: Convert to fraction form
    21,788.48/32,682.72 = 5,372.48/x
  3. Step 3: Cross multiply
    21,788.48x = 32,682.72 × 5,372.48
  4. Step 4: Simplify right side
    21,788.48x = 175,587,259.55
  5. Step 5: Solve for x
    x = 175,587,259.55/21,788.48
  6. Step 6: Final answer
    x = 8,058.72

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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.