Home / 28,355.88-39,128.55-16,420.02

Finding the Fourth Proportional to 28,355.88, 39,128.55 and 16,420.02

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Solution

The fourth proportional to 28,355.88, 39,128.55 and 16,420.02 is: 22,658.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,355.88 : 39,128.55 = 16,420.02 : x
  2. Step 2: Convert to fraction form
    28,355.88/39,128.55 = 16,420.02/x
  3. Step 3: Cross multiply
    28,355.88x = 39,128.55 × 16,420.02
  4. Step 4: Simplify right side
    28,355.88x = 642,491,573.57
  5. Step 5: Solve for x
    x = 642,491,573.57/28,355.88
  6. Step 6: Final answer
    x = 22,658.14

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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.