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Finding the Fourth Proportional to 20,460.54, 30,692.11 and 6,421.13

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Solution

The fourth proportional to 20,460.54, 30,692.11 and 6,421.13 is: 9,632.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,460.54 : 30,692.11 = 6,421.13 : x
  2. Step 2: Convert to fraction form
    20,460.54/30,692.11 = 6,421.13/x
  3. Step 3: Cross multiply
    20,460.54x = 30,692.11 × 6,421.13
  4. Step 4: Simplify right side
    20,460.54x = 197,077,890.88
  5. Step 5: Solve for x
    x = 197,077,890.88/20,460.54
  6. Step 6: Final answer
    x = 9,632.10

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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.