Home / 20,930.12-28,880.32-13,383.16

Finding the Fourth Proportional to 20,930.12, 28,880.32 and 13,383.16

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Solution

The fourth proportional to 20,930.12, 28,880.32 and 13,383.16 is: 18,466.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,930.12 : 28,880.32 = 13,383.16 : x
  2. Step 2: Convert to fraction form
    20,930.12/28,880.32 = 13,383.16/x
  3. Step 3: Cross multiply
    20,930.12x = 28,880.32 × 13,383.16
  4. Step 4: Simplify right side
    20,930.12x = 386,509,943.41
  5. Step 5: Solve for x
    x = 386,509,943.41/20,930.12
  6. Step 6: Final answer
    x = 18,466.69

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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.