Home / 28,578.90-42,838.58-11,948.59

Finding the Fourth Proportional to 28,578.90, 42,838.58 and 11,948.59

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Solution

The fourth proportional to 28,578.90, 42,838.58 and 11,948.59 is: 17,910.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,578.90 : 42,838.58 = 11,948.59 : x
  2. Step 2: Convert to fraction form
    28,578.90/42,838.58 = 11,948.59/x
  3. Step 3: Cross multiply
    28,578.90x = 42,838.58 × 11,948.59
  4. Step 4: Simplify right side
    28,578.90x = 511,860,414.41
  5. Step 5: Solve for x
    x = 511,860,414.41/28,578.90
  6. Step 6: Final answer
    x = 17,910.43

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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.