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Finding the Fourth Proportional to 12,828.20, 17,682.18 and 12,828.20

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Solution

The fourth proportional to 12,828.20, 17,682.18 and 12,828.20 is: 17,682.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,828.20 : 17,682.18 = 12,828.20 : x
  2. Step 2: Convert to fraction form
    12,828.20/17,682.18 = 12,828.20/x
  3. Step 3: Cross multiply
    12,828.20x = 17,682.18 × 12,828.20
  4. Step 4: Simplify right side
    12,828.20x = 226,830,541.48
  5. Step 5: Solve for x
    x = 226,830,541.48/12,828.20
  6. Step 6: Final answer
    x = 17,682.18

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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.