Home / 28,409.89-42,622.71-12,400.80

Finding the Fourth Proportional to 28,409.89, 42,622.71 and 12,400.80

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Solution

The fourth proportional to 28,409.89, 42,622.71 and 12,400.80 is: 18,604.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,409.89 : 42,622.71 = 12,400.80 : x
  2. Step 2: Convert to fraction form
    28,409.89/42,622.71 = 12,400.80/x
  3. Step 3: Cross multiply
    28,409.89x = 42,622.71 × 12,400.80
  4. Step 4: Simplify right side
    28,409.89x = 528,555,495.83
  5. Step 5: Solve for x
    x = 528,555,495.83/28,409.89
  6. Step 6: Final answer
    x = 18,604.63

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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.