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Finding the Fourth Proportional to 20,403, 30,601.80 and 8,559.18

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Solution

The fourth proportional to 20,403, 30,601.80 and 8,559.18 is: 12,837.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,403 : 30,601.80 = 8,559.18 : x
  2. Step 2: Convert to fraction form
    20,403/30,601.80 = 8,559.18/x
  3. Step 3: Cross multiply
    20,403x = 30,601.80 × 8,559.18
  4. Step 4: Simplify right side
    20,403x = 261,926,314.52
  5. Step 5: Solve for x
    x = 261,926,314.52/20,403
  6. Step 6: Final answer
    x = 12,837.64

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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.