Home / 6,261.50-8,640.78-3,609.20

Finding the Fourth Proportional to 6,261.50, 8,640.78 and 3,609.20

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Solution

The fourth proportional to 6,261.50, 8,640.78 and 3,609.20 is: 4,980.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,261.50 : 8,640.78 = 3,609.20 : x
  2. Step 2: Convert to fraction form
    6,261.50/8,640.78 = 3,609.20/x
  3. Step 3: Cross multiply
    6,261.50x = 8,640.78 × 3,609.20
  4. Step 4: Simplify right side
    6,261.50x = 31,186,303.18
  5. Step 5: Solve for x
    x = 31,186,303.18/6,261.50
  6. Step 6: Final answer
    x = 4,980.64

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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.