Home / 28,579.90-42,840.08-11,949.59

Finding the Fourth Proportional to 28,579.90, 42,840.08 and 11,949.59

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Solution

The fourth proportional to 28,579.90, 42,840.08 and 11,949.59 is: 17,911.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,579.90 : 42,840.08 = 11,949.59 : x
  2. Step 2: Convert to fraction form
    28,579.90/42,840.08 = 11,949.59/x
  3. Step 3: Cross multiply
    28,579.90x = 42,840.08 × 11,949.59
  4. Step 4: Simplify right side
    28,579.90x = 511,921,391.57
  5. Step 5: Solve for x
    x = 511,921,391.57/28,579.90
  6. Step 6: Final answer
    x = 17,911.94

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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.