Home / 5,138.02-7,689.60-3,290.40

Finding the Fourth Proportional to 5,138.02, 7,689.60 and 3,290.40

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Solution

The fourth proportional to 5,138.02, 7,689.60 and 3,290.40 is: 4,924.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,138.02 : 7,689.60 = 3,290.40 : x
  2. Step 2: Convert to fraction form
    5,138.02/7,689.60 = 3,290.40/x
  3. Step 3: Cross multiply
    5,138.02x = 7,689.60 × 3,290.40
  4. Step 4: Simplify right side
    5,138.02x = 25,301,859.84
  5. Step 5: Solve for x
    x = 25,301,859.84/5,138.02
  6. Step 6: Final answer
    x = 4,924.44

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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.