Home / 19,990.36-29,979.78-6,140.44

Finding the Fourth Proportional to 19,990.36, 29,979.78 and 6,140.44

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Solution

The fourth proportional to 19,990.36, 29,979.78 and 6,140.44 is: 9,208.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,990.36 : 29,979.78 = 6,140.44 : x
  2. Step 2: Convert to fraction form
    19,990.36/29,979.78 = 6,140.44/x
  3. Step 3: Cross multiply
    19,990.36x = 29,979.78 × 6,140.44
  4. Step 4: Simplify right side
    19,990.36x = 184,089,040.30
  5. Step 5: Solve for x
    x = 184,089,040.30/19,990.36
  6. Step 6: Final answer
    x = 9,208.89

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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.