Home / 5,078.56-6,986.40-4,478.08

Finding the Fourth Proportional to 5,078.56, 6,986.40 and 4,478.08

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Solution

The fourth proportional to 5,078.56, 6,986.40 and 4,478.08 is: 6,160.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,078.56 : 6,986.40 = 4,478.08 : x
  2. Step 2: Convert to fraction form
    5,078.56/6,986.40 = 4,478.08/x
  3. Step 3: Cross multiply
    5,078.56x = 6,986.40 × 4,478.08
  4. Step 4: Simplify right side
    5,078.56x = 31,285,658.11
  5. Step 5: Solve for x
    x = 31,285,658.11/5,078.56
  6. Step 6: Final answer
    x = 6,160.34

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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.