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Finding the Fourth Proportional to 12,428.97, 17,152.05 and 6,763.80

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Solution

The fourth proportional to 12,428.97, 17,152.05 and 6,763.80 is: 9,334.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,428.97 : 17,152.05 = 6,763.80 : x
  2. Step 2: Convert to fraction form
    12,428.97/17,152.05 = 6,763.80/x
  3. Step 3: Cross multiply
    12,428.97x = 17,152.05 × 6,763.80
  4. Step 4: Simplify right side
    12,428.97x = 116,013,035.79
  5. Step 5: Solve for x
    x = 116,013,035.79/12,428.97
  6. Step 6: Final answer
    x = 9,334.08

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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.