Home / 20,881.51-28,816.39-11,450.07

Finding the Fourth Proportional to 20,881.51, 28,816.39 and 11,450.07

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Solution

The fourth proportional to 20,881.51, 28,816.39 and 11,450.07 is: 15,801.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,881.51 : 28,816.39 = 11,450.07 : x
  2. Step 2: Convert to fraction form
    20,881.51/28,816.39 = 11,450.07/x
  3. Step 3: Cross multiply
    20,881.51x = 28,816.39 × 11,450.07
  4. Step 4: Simplify right side
    20,881.51x = 329,949,696.96
  5. Step 5: Solve for x
    x = 329,949,696.96/20,881.51
  6. Step 6: Final answer
    x = 15,801.05

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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.