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Finding the Fourth Proportional to 12,858.80, 19,288.20 and 10,266.80

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Solution

The fourth proportional to 12,858.80, 19,288.20 and 10,266.80 is: 15,400.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,858.80 : 19,288.20 = 10,266.80 : x
  2. Step 2: Convert to fraction form
    12,858.80/19,288.20 = 10,266.80/x
  3. Step 3: Cross multiply
    12,858.80x = 19,288.20 × 10,266.80
  4. Step 4: Simplify right side
    12,858.80x = 198,028,091.76
  5. Step 5: Solve for x
    x = 198,028,091.76/12,858.80
  6. Step 6: Final answer
    x = 15,400.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.