Home / 20,963.14-28,928.82-11,403.18

Finding the Fourth Proportional to 20,963.14, 28,928.82 and 11,403.18

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Solution

The fourth proportional to 20,963.14, 28,928.82 and 11,403.18 is: 15,736.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,963.14 : 28,928.82 = 11,403.18 : x
  2. Step 2: Convert to fraction form
    20,963.14/28,928.82 = 11,403.18/x
  3. Step 3: Cross multiply
    20,963.14x = 28,928.82 × 11,403.18
  4. Step 4: Simplify right side
    20,963.14x = 329,880,541.65
  5. Step 5: Solve for x
    x = 329,880,541.65/20,963.14
  6. Step 6: Final answer
    x = 15,736.22

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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.