Home / 20,640.36-28,492.41-13,935.07

Finding the Fourth Proportional to 20,640.36, 28,492.41 and 13,935.07

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Solution

The fourth proportional to 20,640.36, 28,492.41 and 13,935.07 is: 19,236.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,640.36 : 28,492.41 = 13,935.07 : x
  2. Step 2: Convert to fraction form
    20,640.36/28,492.41 = 13,935.07/x
  3. Step 3: Cross multiply
    20,640.36x = 28,492.41 × 13,935.07
  4. Step 4: Simplify right side
    20,640.36x = 397,043,585.36
  5. Step 5: Solve for x
    x = 397,043,585.36/20,640.36
  6. Step 6: Final answer
    x = 19,236.28

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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.