Home / 2,988.02-4,126.92-1,991.66

Finding the Fourth Proportional to 2,988.02, 4,126.92 and 1,991.66

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Solution

The fourth proportional to 2,988.02, 4,126.92 and 1,991.66 is: 2,750.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,988.02 : 4,126.92 = 1,991.66 : x
  2. Step 2: Convert to fraction form
    2,988.02/4,126.92 = 1,991.66/x
  3. Step 3: Cross multiply
    2,988.02x = 4,126.92 × 1,991.66
  4. Step 4: Simplify right side
    2,988.02x = 8,219,421.49
  5. Step 5: Solve for x
    x = 8,219,421.49/2,988.02
  6. Step 6: Final answer
    x = 2,750.79

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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.