Home / 2,072.80-3,111.36-1,985.32

Finding the Fourth Proportional to 2,072.80, 3,111.36 and 1,985.32

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Solution

The fourth proportional to 2,072.80, 3,111.36 and 1,985.32 is: 2,980.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,072.80 : 3,111.36 = 1,985.32 : x
  2. Step 2: Convert to fraction form
    2,072.80/3,111.36 = 1,985.32/x
  3. Step 3: Cross multiply
    2,072.80x = 3,111.36 × 1,985.32
  4. Step 4: Simplify right side
    2,072.80x = 6,177,045.24
  5. Step 5: Solve for x
    x = 6,177,045.24/2,072.80
  6. Step 6: Final answer
    x = 2,980.05

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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.