Home / 2,989.56-4,126.08-1,810.80

Finding the Fourth Proportional to 2,989.56, 4,126.08 and 1,810.80

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Solution

The fourth proportional to 2,989.56, 4,126.08 and 1,810.80 is: 2,499.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,989.56 : 4,126.08 = 1,810.80 : x
  2. Step 2: Convert to fraction form
    2,989.56/4,126.08 = 1,810.80/x
  3. Step 3: Cross multiply
    2,989.56x = 4,126.08 × 1,810.80
  4. Step 4: Simplify right side
    2,989.56x = 7,471,505.66
  5. Step 5: Solve for x
    x = 7,471,505.66/2,989.56
  6. Step 6: Final answer
    x = 2,499.20

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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.