Home / 28,708-42,907.96-25,890.40

Finding the Fourth Proportional to 28,708, 42,907.96 and 25,890.40

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Solution

The fourth proportional to 28,708, 42,907.96 and 25,890.40 is: 38,696.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,708 : 42,907.96 = 25,890.40 : x
  2. Step 2: Convert to fraction form
    28,708/42,907.96 = 25,890.40/x
  3. Step 3: Cross multiply
    28,708x = 42,907.96 × 25,890.40
  4. Step 4: Simplify right side
    28,708x = 1,110,904,247.58
  5. Step 5: Solve for x
    x = 1,110,904,247.58/28,708
  6. Step 6: Final answer
    x = 38,696.68

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.