Home / 7,980.02-11,971.75-3,979.59

Finding the Fourth Proportional to 7,980.02, 11,971.75 and 3,979.59

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Solution

The fourth proportional to 7,980.02, 11,971.75 and 3,979.59 is: 5,970.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,980.02 : 11,971.75 = 3,979.59 : x
  2. Step 2: Convert to fraction form
    7,980.02/11,971.75 = 3,979.59/x
  3. Step 3: Cross multiply
    7,980.02x = 11,971.75 × 3,979.59
  4. Step 4: Simplify right side
    7,980.02x = 47,642,656.58
  5. Step 5: Solve for x
    x = 47,642,656.58/7,980.02
  6. Step 6: Final answer
    x = 5,970.24

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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.