Home / 12,385.83-18,579.63-4,990.33

Finding the Fourth Proportional to 12,385.83, 18,579.63 and 4,990.33

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Solution

The fourth proportional to 12,385.83, 18,579.63 and 4,990.33 is: 7,485.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,385.83 : 18,579.63 = 4,990.33 : x
  2. Step 2: Convert to fraction form
    12,385.83/18,579.63 = 4,990.33/x
  3. Step 3: Cross multiply
    12,385.83x = 18,579.63 × 4,990.33
  4. Step 4: Simplify right side
    12,385.83x = 92,718,484.98
  5. Step 5: Solve for x
    x = 92,718,484.98/12,385.83
  6. Step 6: Final answer
    x = 7,485.85

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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.