Home / 20,879.10-31,314.42-9,782.82

Finding the Fourth Proportional to 20,879.10, 31,314.42 and 9,782.82

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Solution

The fourth proportional to 20,879.10, 31,314.42 and 9,782.82 is: 14,672.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,879.10 : 31,314.42 = 9,782.82 : x
  2. Step 2: Convert to fraction form
    20,879.10/31,314.42 = 9,782.82/x
  3. Step 3: Cross multiply
    20,879.10x = 31,314.42 × 9,782.82
  4. Step 4: Simplify right side
    20,879.10x = 306,343,334.26
  5. Step 5: Solve for x
    x = 306,343,334.26/20,879.10
  6. Step 6: Final answer
    x = 14,672.25

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.