Home / 12,570.75-18,858.55-4,778.96

Finding the Fourth Proportional to 12,570.75, 18,858.55 and 4,778.96

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Solution

The fourth proportional to 12,570.75, 18,858.55 and 4,778.96 is: 7,169.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,570.75 : 18,858.55 = 4,778.96 : x
  2. Step 2: Convert to fraction form
    12,570.75/18,858.55 = 4,778.96/x
  3. Step 3: Cross multiply
    12,570.75x = 18,858.55 × 4,778.96
  4. Step 4: Simplify right side
    12,570.75x = 90,124,167.79
  5. Step 5: Solve for x
    x = 90,124,167.79/12,570.75
  6. Step 6: Final answer
    x = 7,169.35

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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.