Home / 28,365.40-42,552.60-8,639.38

Finding the Fourth Proportional to 28,365.40, 42,552.60 and 8,639.38

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Solution

The fourth proportional to 28,365.40, 42,552.60 and 8,639.38 is: 12,960.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,365.40 : 42,552.60 = 8,639.38 : x
  2. Step 2: Convert to fraction form
    28,365.40/42,552.60 = 8,639.38/x
  3. Step 3: Cross multiply
    28,365.40x = 42,552.60 × 8,639.38
  4. Step 4: Simplify right side
    28,365.40x = 367,628,081.39
  5. Step 5: Solve for x
    x = 367,628,081.39/28,365.40
  6. Step 6: Final answer
    x = 12,960.44

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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.