Home / 12,379.60-18,569.44-3,145.60

Finding the Fourth Proportional to 12,379.60, 18,569.44 and 3,145.60

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Solution

The fourth proportional to 12,379.60, 18,569.44 and 3,145.60 is: 4,718.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,379.60 : 18,569.44 = 3,145.60 : x
  2. Step 2: Convert to fraction form
    12,379.60/18,569.44 = 3,145.60/x
  3. Step 3: Cross multiply
    12,379.60x = 18,569.44 × 3,145.60
  4. Step 4: Simplify right side
    12,379.60x = 58,412,030.46
  5. Step 5: Solve for x
    x = 58,412,030.46/12,379.60
  6. Step 6: Final answer
    x = 4,718.41

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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.