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Finding the Fourth Proportional to 18,672, 28,012.80 and 6,360

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Solution

The fourth proportional to 18,672, 28,012.80 and 6,360 is: 9,541.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,672 : 28,012.80 = 6,360 : x
  2. Step 2: Convert to fraction form
    18,672/28,012.80 = 6,360/x
  3. Step 3: Cross multiply
    18,672x = 28,012.80 × 6,360
  4. Step 4: Simplify right side
    18,672x = 178,161,408
  5. Step 5: Solve for x
    x = 178,161,408/18,672
  6. Step 6: Final answer
    x = 9,541.63

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.