Home / 3,115.60-4,290.78-3,047.56

Finding the Fourth Proportional to 3,115.60, 4,290.78 and 3,047.56

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Solution

The fourth proportional to 3,115.60, 4,290.78 and 3,047.56 is: 4,197.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,115.60 : 4,290.78 = 3,047.56 : x
  2. Step 2: Convert to fraction form
    3,115.60/4,290.78 = 3,047.56/x
  3. Step 3: Cross multiply
    3,115.60x = 4,290.78 × 3,047.56
  4. Step 4: Simplify right side
    3,115.60x = 13,076,409.50
  5. Step 5: Solve for x
    x = 13,076,409.50/3,115.60
  6. Step 6: Final answer
    x = 4,197.08

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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.