Home / 28,491.15-39,317.58-15,745.20

Finding the Fourth Proportional to 28,491.15, 39,317.58 and 15,745.20

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Solution

The fourth proportional to 28,491.15, 39,317.58 and 15,745.20 is: 21,728.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,491.15 : 39,317.58 = 15,745.20 : x
  2. Step 2: Convert to fraction form
    28,491.15/39,317.58 = 15,745.20/x
  3. Step 3: Cross multiply
    28,491.15x = 39,317.58 × 15,745.20
  4. Step 4: Simplify right side
    28,491.15x = 619,063,160.62
  5. Step 5: Solve for x
    x = 619,063,160.62/28,491.15
  6. Step 6: Final answer
    x = 21,728.26

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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.