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Finding the Fourth Proportional to 18,326.76, 27,478.80 and 12,465.60

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Solution

The fourth proportional to 18,326.76, 27,478.80 and 12,465.60 is: 18,690.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,326.76 : 27,478.80 = 12,465.60 : x
  2. Step 2: Convert to fraction form
    18,326.76/27,478.80 = 12,465.60/x
  3. Step 3: Cross multiply
    18,326.76x = 27,478.80 × 12,465.60
  4. Step 4: Simplify right side
    18,326.76x = 342,539,729.28
  5. Step 5: Solve for x
    x = 342,539,729.28/18,326.76
  6. Step 6: Final answer
    x = 18,690.69

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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.