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Finding the Fourth Proportional to 22,699.80, 34,049.70 and 12,858.30

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Solution

The fourth proportional to 22,699.80, 34,049.70 and 12,858.30 is: 19,287.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,699.80 : 34,049.70 = 12,858.30 : x
  2. Step 2: Convert to fraction form
    22,699.80/34,049.70 = 12,858.30/x
  3. Step 3: Cross multiply
    22,699.80x = 34,049.70 × 12,858.30
  4. Step 4: Simplify right side
    22,699.80x = 437,821,257.51
  5. Step 5: Solve for x
    x = 437,821,257.51/22,699.80
  6. Step 6: Final answer
    x = 19,287.45

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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.