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Finding the Fourth Proportional to 20,460.59, 30,692.18 and 6,421.17

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Solution

The fourth proportional to 20,460.59, 30,692.18 and 6,421.17 is: 9,632.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,460.59 : 30,692.18 = 6,421.17 : x
  2. Step 2: Convert to fraction form
    20,460.59/30,692.18 = 6,421.17/x
  3. Step 3: Cross multiply
    20,460.59x = 30,692.18 × 6,421.17
  4. Step 4: Simplify right side
    20,460.59x = 197,079,713.48
  5. Step 5: Solve for x
    x = 197,079,713.48/20,460.59
  6. Step 6: Final answer
    x = 9,632.16

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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.