Home / 5,409.63-8,118.09-2,638.22

Finding the Fourth Proportional to 5,409.63, 8,118.09 and 2,638.22

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Solution

The fourth proportional to 5,409.63, 8,118.09 and 2,638.22 is: 3,959.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,409.63 : 8,118.09 = 2,638.22 : x
  2. Step 2: Convert to fraction form
    5,409.63/8,118.09 = 2,638.22/x
  3. Step 3: Cross multiply
    5,409.63x = 8,118.09 × 2,638.22
  4. Step 4: Simplify right side
    5,409.63x = 21,417,266.81
  5. Step 5: Solve for x
    x = 21,417,266.81/5,409.63
  6. Step 6: Final answer
    x = 3,959.10

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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.