Home / 7,111.09-10,666.70-2,180.75

Finding the Fourth Proportional to 7,111.09, 10,666.70 and 2,180.75

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Solution

The fourth proportional to 7,111.09, 10,666.70 and 2,180.75 is: 3,271.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,111.09 : 10,666.70 = 2,180.75 : x
  2. Step 2: Convert to fraction form
    7,111.09/10,666.70 = 2,180.75/x
  3. Step 3: Cross multiply
    7,111.09x = 10,666.70 × 2,180.75
  4. Step 4: Simplify right side
    7,111.09x = 23,261,395.12
  5. Step 5: Solve for x
    x = 23,261,395.12/7,111.09
  6. Step 6: Final answer
    x = 3,271.15

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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.