Home / 19,979.56-29,969.40-5,188.60

Finding the Fourth Proportional to 19,979.56, 29,969.40 and 5,188.60

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Solution

The fourth proportional to 19,979.56, 29,969.40 and 5,188.60 is: 7,782.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,979.56 : 29,969.40 = 5,188.60 : x
  2. Step 2: Convert to fraction form
    19,979.56/29,969.40 = 5,188.60/x
  3. Step 3: Cross multiply
    19,979.56x = 29,969.40 × 5,188.60
  4. Step 4: Simplify right side
    19,979.56x = 155,499,202.90
  5. Step 5: Solve for x
    x = 155,499,202.90/19,979.56
  6. Step 6: Final answer
    x = 7,782.91

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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.