Home / 18,718.38-28,076.70-4,678.50

Finding the Fourth Proportional to 18,718.38, 28,076.70 and 4,678.50

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Solution

The fourth proportional to 18,718.38, 28,076.70 and 4,678.50 is: 7,017.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,718.38 : 28,076.70 = 4,678.50 : x
  2. Step 2: Convert to fraction form
    18,718.38/28,076.70 = 4,678.50/x
  3. Step 3: Cross multiply
    18,718.38x = 28,076.70 × 4,678.50
  4. Step 4: Simplify right side
    18,718.38x = 131,356,840.95
  5. Step 5: Solve for x
    x = 131,356,840.95/18,718.38
  6. Step 6: Final answer
    x = 7,017.53

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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.