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Finding the Fourth Proportional to 18,927.16, 28,390.74 and 16,172.44

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Solution

The fourth proportional to 18,927.16, 28,390.74 and 16,172.44 is: 24,258.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,927.16 : 28,390.74 = 16,172.44 : x
  2. Step 2: Convert to fraction form
    18,927.16/28,390.74 = 16,172.44/x
  3. Step 3: Cross multiply
    18,927.16x = 28,390.74 × 16,172.44
  4. Step 4: Simplify right side
    18,927.16x = 459,147,539.21
  5. Step 5: Solve for x
    x = 459,147,539.21/18,927.16
  6. Step 6: Final answer
    x = 24,258.66

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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.