Home / 20,879.96-31,319.52-5,085.08

Finding the Fourth Proportional to 20,879.96, 31,319.52 and 5,085.08

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Solution

The fourth proportional to 20,879.96, 31,319.52 and 5,085.08 is: 7,627.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,879.96 : 31,319.52 = 5,085.08 : x
  2. Step 2: Convert to fraction form
    20,879.96/31,319.52 = 5,085.08/x
  3. Step 3: Cross multiply
    20,879.96x = 31,319.52 × 5,085.08
  4. Step 4: Simplify right side
    20,879.96x = 159,262,264.76
  5. Step 5: Solve for x
    x = 159,262,264.76/20,879.96
  6. Step 6: Final answer
    x = 7,627.52

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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.