Home / 28,442.40-42,629.00-20,124.81

Finding the Fourth Proportional to 28,442.40, 42,629.00 and 20,124.81

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Solution

The fourth proportional to 28,442.40, 42,629.00 and 20,124.81 is: 30,162.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,442.40 : 42,629.00 = 20,124.81 : x
  2. Step 2: Convert to fraction form
    28,442.40/42,629.00 = 20,124.81/x
  3. Step 3: Cross multiply
    28,442.40x = 42,629.00 × 20,124.81
  4. Step 4: Simplify right side
    28,442.40x = 857,900,424.87
  5. Step 5: Solve for x
    x = 857,900,424.87/28,442.40
  6. Step 6: Final answer
    x = 30,162.73

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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.