Home / 12,345.75-18,518.83-3,581.55

Finding the Fourth Proportional to 12,345.75, 18,518.83 and 3,581.55

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Solution

The fourth proportional to 12,345.75, 18,518.83 and 3,581.55 is: 5,372.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,345.75 : 18,518.83 = 3,581.55 : x
  2. Step 2: Convert to fraction form
    12,345.75/18,518.83 = 3,581.55/x
  3. Step 3: Cross multiply
    12,345.75x = 18,518.83 × 3,581.55
  4. Step 4: Simplify right side
    12,345.75x = 66,326,106.63
  5. Step 5: Solve for x
    x = 66,326,106.63/12,345.75
  6. Step 6: Final answer
    x = 5,372.38

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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.