Home / 28,442.89-39,243.31-18,371.76

Finding the Fourth Proportional to 28,442.89, 39,243.31 and 18,371.76

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Solution

The fourth proportional to 28,442.89, 39,243.31 and 18,371.76 is: 25,347.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,442.89 : 39,243.31 = 18,371.76 : x
  2. Step 2: Convert to fraction form
    28,442.89/39,243.31 = 18,371.76/x
  3. Step 3: Cross multiply
    28,442.89x = 39,243.31 × 18,371.76
  4. Step 4: Simplify right side
    28,442.89x = 720,968,672.93
  5. Step 5: Solve for x
    x = 720,968,672.93/28,442.89
  6. Step 6: Final answer
    x = 25,347.94

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.