Home / 28,280.78-42,418.41-14,235.21

Finding the Fourth Proportional to 28,280.78, 42,418.41 and 14,235.21

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Solution

The fourth proportional to 28,280.78, 42,418.41 and 14,235.21 is: 21,351.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,280.78 : 42,418.41 = 14,235.21 : x
  2. Step 2: Convert to fraction form
    28,280.78/42,418.41 = 14,235.21/x
  3. Step 3: Cross multiply
    28,280.78x = 42,418.41 × 14,235.21
  4. Step 4: Simplify right side
    28,280.78x = 603,834,974.22
  5. Step 5: Solve for x
    x = 603,834,974.22/28,280.78
  6. Step 6: Final answer
    x = 21,351.43

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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.