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Finding the Fourth Proportional to 12,812.10, 19,230.30 and 10,965.30

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Solution

The fourth proportional to 12,812.10, 19,230.30 and 10,965.30 is: 16,458.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,812.10 : 19,230.30 = 10,965.30 : x
  2. Step 2: Convert to fraction form
    12,812.10/19,230.30 = 10,965.30/x
  3. Step 3: Cross multiply
    12,812.10x = 19,230.30 × 10,965.30
  4. Step 4: Simplify right side
    12,812.10x = 210,866,008.59
  5. Step 5: Solve for x
    x = 210,866,008.59/12,812.10
  6. Step 6: Final answer
    x = 16,458.35

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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.