Home / 19,179.09-28,772.55-8,085.78

Finding the Fourth Proportional to 19,179.09, 28,772.55 and 8,085.78

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Solution

The fourth proportional to 19,179.09, 28,772.55 and 8,085.78 is: 12,130.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,179.09 : 28,772.55 = 8,085.78 : x
  2. Step 2: Convert to fraction form
    19,179.09/28,772.55 = 8,085.78/x
  3. Step 3: Cross multiply
    19,179.09x = 28,772.55 × 8,085.78
  4. Step 4: Simplify right side
    19,179.09x = 232,648,365.48
  5. Step 5: Solve for x
    x = 232,648,365.48/19,179.09
  6. Step 6: Final answer
    x = 12,130.32

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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.