Home / 4,989.02-6,889.50-3,129.26

Finding the Fourth Proportional to 4,989.02, 6,889.50 and 3,129.26

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Solution

The fourth proportional to 4,989.02, 6,889.50 and 3,129.26 is: 4,321.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,989.02 : 6,889.50 = 3,129.26 : x
  2. Step 2: Convert to fraction form
    4,989.02/6,889.50 = 3,129.26/x
  3. Step 3: Cross multiply
    4,989.02x = 6,889.50 × 3,129.26
  4. Step 4: Simplify right side
    4,989.02x = 21,559,036.77
  5. Step 5: Solve for x
    x = 21,559,036.77/4,989.02
  6. Step 6: Final answer
    x = 4,321.30

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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.