Home / 28,578.20-39,437-15,830.86

Finding the Fourth Proportional to 28,578.20, 39,437 and 15,830.86

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Solution

The fourth proportional to 28,578.20, 39,437 and 15,830.86 is: 21,846.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,578.20 : 39,437 = 15,830.86 : x
  2. Step 2: Convert to fraction form
    28,578.20/39,437 = 15,830.86/x
  3. Step 3: Cross multiply
    28,578.20x = 39,437 × 15,830.86
  4. Step 4: Simplify right side
    28,578.20x = 624,321,625.82
  5. Step 5: Solve for x
    x = 624,321,625.82/28,578.20
  6. Step 6: Final answer
    x = 21,846.08

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.