Home / 13,790.73-19,035.12-8,128.77

Finding the Fourth Proportional to 13,790.73, 19,035.12 and 8,128.77

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Solution

The fourth proportional to 13,790.73, 19,035.12 and 8,128.77 is: 11,220.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,790.73 : 19,035.12 = 8,128.77 : x
  2. Step 2: Convert to fraction form
    13,790.73/19,035.12 = 8,128.77/x
  3. Step 3: Cross multiply
    13,790.73x = 19,035.12 × 8,128.77
  4. Step 4: Simplify right side
    13,790.73x = 154,732,112.40
  5. Step 5: Solve for x
    x = 154,732,112.40/13,790.73
  6. Step 6: Final answer
    x = 11,220.01

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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.