Home / 2,988.77-4,118.81-2,192.31

Finding the Fourth Proportional to 2,988.77, 4,118.81 and 2,192.31

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Solution

The fourth proportional to 2,988.77, 4,118.81 and 2,192.31 is: 3,021.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,988.77 : 4,118.81 = 2,192.31 : x
  2. Step 2: Convert to fraction form
    2,988.77/4,118.81 = 2,192.31/x
  3. Step 3: Cross multiply
    2,988.77x = 4,118.81 × 2,192.31
  4. Step 4: Simplify right side
    2,988.77x = 9,029,697.39
  5. Step 5: Solve for x
    x = 9,029,697.39/2,988.77
  6. Step 6: Final answer
    x = 3,021.21

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.