Home / 12,570.09-18,857.57-4,778.30

Finding the Fourth Proportional to 12,570.09, 18,857.57 and 4,778.30

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Solution

The fourth proportional to 12,570.09, 18,857.57 and 4,778.30 is: 7,168.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,570.09 : 18,857.57 = 4,778.30 : x
  2. Step 2: Convert to fraction form
    12,570.09/18,857.57 = 4,778.30/x
  3. Step 3: Cross multiply
    12,570.09x = 18,857.57 × 4,778.30
  4. Step 4: Simplify right side
    12,570.09x = 90,107,070.79
  5. Step 5: Solve for x
    x = 90,107,070.79/12,570.09
  6. Step 6: Final answer
    x = 7,168.37

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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.