Home / 18,916.56-28,380.78-7,828.47

Finding the Fourth Proportional to 18,916.56, 28,380.78 and 7,828.47

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Solution

The fourth proportional to 18,916.56, 28,380.78 and 7,828.47 is: 11,745.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,916.56 : 28,380.78 = 7,828.47 : x
  2. Step 2: Convert to fraction form
    18,916.56/28,380.78 = 7,828.47/x
  3. Step 3: Cross multiply
    18,916.56x = 28,380.78 × 7,828.47
  4. Step 4: Simplify right side
    18,916.56x = 222,178,084.81
  5. Step 5: Solve for x
    x = 222,178,084.81/18,916.56
  6. Step 6: Final answer
    x = 11,745.16

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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.