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Finding the Fourth Proportional to 18,951.32, 28,428.42 and 5,804.66

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Solution

The fourth proportional to 18,951.32, 28,428.42 and 5,804.66 is: 8,707.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,951.32 : 28,428.42 = 5,804.66 : x
  2. Step 2: Convert to fraction form
    18,951.32/28,428.42 = 5,804.66/x
  3. Step 3: Cross multiply
    18,951.32x = 28,428.42 × 5,804.66
  4. Step 4: Simplify right side
    18,951.32x = 165,017,312.44
  5. Step 5: Solve for x
    x = 165,017,312.44/18,951.32
  6. Step 6: Final answer
    x = 8,707.43

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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.