Home / 28,430.10-39,232.69-15,854.85

Finding the Fourth Proportional to 28,430.10, 39,232.69 and 15,854.85

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Solution

The fourth proportional to 28,430.10, 39,232.69 and 15,854.85 is: 21,879.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,430.10 : 39,232.69 = 15,854.85 : x
  2. Step 2: Convert to fraction form
    28,430.10/39,232.69 = 15,854.85/x
  3. Step 3: Cross multiply
    28,430.10x = 39,232.69 × 15,854.85
  4. Step 4: Simplify right side
    28,430.10x = 622,028,375.41
  5. Step 5: Solve for x
    x = 622,028,375.41/28,430.10
  6. Step 6: Final answer
    x = 21,879.22

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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.