Home / 28,879.56-39,841.74-19,431.72

Finding the Fourth Proportional to 28,879.56, 39,841.74 and 19,431.72

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Solution

The fourth proportional to 28,879.56, 39,841.74 and 19,431.72 is: 26,807.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,879.56 : 39,841.74 = 19,431.72 : x
  2. Step 2: Convert to fraction form
    28,879.56/39,841.74 = 19,431.72/x
  3. Step 3: Cross multiply
    28,879.56x = 39,841.74 × 19,431.72
  4. Step 4: Simplify right side
    28,879.56x = 774,193,535.99
  5. Step 5: Solve for x
    x = 774,193,535.99/28,879.56
  6. Step 6: Final answer
    x = 26,807.66

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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.