Home / 18,814.37-28,220.67-7,718.31

Finding the Fourth Proportional to 18,814.37, 28,220.67 and 7,718.31

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Solution

The fourth proportional to 18,814.37, 28,220.67 and 7,718.31 is: 11,577.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,814.37 : 28,220.67 = 7,718.31 : x
  2. Step 2: Convert to fraction form
    18,814.37/28,220.67 = 7,718.31/x
  3. Step 3: Cross multiply
    18,814.37x = 28,220.67 × 7,718.31
  4. Step 4: Simplify right side
    18,814.37x = 217,815,879.47
  5. Step 5: Solve for x
    x = 217,815,879.47/18,814.37
  6. Step 6: Final answer
    x = 11,577.11

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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.