Home / 13,879.95-19,152.93-7,911.28

Finding the Fourth Proportional to 13,879.95, 19,152.93 and 7,911.28

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Solution

The fourth proportional to 13,879.95, 19,152.93 and 7,911.28 is: 10,916.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,879.95 : 19,152.93 = 7,911.28 : x
  2. Step 2: Convert to fraction form
    13,879.95/19,152.93 = 7,911.28/x
  3. Step 3: Cross multiply
    13,879.95x = 19,152.93 × 7,911.28
  4. Step 4: Simplify right side
    13,879.95x = 151,524,192.05
  5. Step 5: Solve for x
    x = 151,524,192.05/13,879.95
  6. Step 6: Final answer
    x = 10,916.77

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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.