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Finding the Fourth Proportional to 20,638.95, 30,962.73 and 9,388.95

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Solution

The fourth proportional to 20,638.95, 30,962.73 and 9,388.95 is: 14,085.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,638.95 : 30,962.73 = 9,388.95 : x
  2. Step 2: Convert to fraction form
    20,638.95/30,962.73 = 9,388.95/x
  3. Step 3: Cross multiply
    20,638.95x = 30,962.73 × 9,388.95
  4. Step 4: Simplify right side
    20,638.95x = 290,707,523.83
  5. Step 5: Solve for x
    x = 290,707,523.83/20,638.95
  6. Step 6: Final answer
    x = 14,085.38

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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.