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Finding the Fourth Proportional to 18,669.76, 28,008.72 and 6,193.60

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Solution

The fourth proportional to 18,669.76, 28,008.72 and 6,193.60 is: 9,291.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,669.76 : 28,008.72 = 6,193.60 : x
  2. Step 2: Convert to fraction form
    18,669.76/28,008.72 = 6,193.60/x
  3. Step 3: Cross multiply
    18,669.76x = 28,008.72 × 6,193.60
  4. Step 4: Simplify right side
    18,669.76x = 173,474,808.19
  5. Step 5: Solve for x
    x = 173,474,808.19/18,669.76
  6. Step 6: Final answer
    x = 9,291.75

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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.