Home / 12,570.37-18,857.99-4,778.58

Finding the Fourth Proportional to 12,570.37, 18,857.99 and 4,778.58

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Solution

The fourth proportional to 12,570.37, 18,857.99 and 4,778.58 is: 7,168.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,570.37 : 18,857.99 = 4,778.58 : x
  2. Step 2: Convert to fraction form
    12,570.37/18,857.99 = 4,778.58/x
  3. Step 3: Cross multiply
    12,570.37x = 18,857.99 × 4,778.58
  4. Step 4: Simplify right side
    12,570.37x = 90,114,377.00
  5. Step 5: Solve for x
    x = 90,114,377.00/12,570.37
  6. Step 6: Final answer
    x = 7,168.79

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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.