Home / 13,878.95-19,151.55-7,910.28

Finding the Fourth Proportional to 13,878.95, 19,151.55 and 7,910.28

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Solution

The fourth proportional to 13,878.95, 19,151.55 and 7,910.28 is: 10,915.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,878.95 : 19,151.55 = 7,910.28 : x
  2. Step 2: Convert to fraction form
    13,878.95/19,151.55 = 7,910.28/x
  3. Step 3: Cross multiply
    13,878.95x = 19,151.55 × 7,910.28
  4. Step 4: Simplify right side
    13,878.95x = 151,494,122.93
  5. Step 5: Solve for x
    x = 151,494,122.93/13,878.95
  6. Step 6: Final answer
    x = 10,915.39

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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.