Home / 28,352.97-39,126.47-15,778.89

Finding the Fourth Proportional to 28,352.97, 39,126.47 and 15,778.89

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Solution

The fourth proportional to 28,352.97, 39,126.47 and 15,778.89 is: 21,774.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,352.97 : 39,126.47 = 15,778.89 : x
  2. Step 2: Convert to fraction form
    28,352.97/39,126.47 = 15,778.89/x
  3. Step 3: Cross multiply
    28,352.97x = 39,126.47 × 15,778.89
  4. Step 4: Simplify right side
    28,352.97x = 617,372,187.32
  5. Step 5: Solve for x
    x = 617,372,187.32/28,352.97
  6. Step 6: Final answer
    x = 21,774.52

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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.