Home / 13,880.09-19,155.02-7,910.80

Finding the Fourth Proportional to 13,880.09, 19,155.02 and 7,910.80

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Solution

The fourth proportional to 13,880.09, 19,155.02 and 7,910.80 is: 10,917.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,880.09 : 19,155.02 = 7,910.80 : x
  2. Step 2: Convert to fraction form
    13,880.09/19,155.02 = 7,910.80/x
  3. Step 3: Cross multiply
    13,880.09x = 19,155.02 × 7,910.80
  4. Step 4: Simplify right side
    13,880.09x = 151,531,436.44
  5. Step 5: Solve for x
    x = 151,531,436.44/13,880.09
  6. Step 6: Final answer
    x = 10,917.18

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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.