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Finding the Fourth Proportional to 12,907.91, 19,365.53 and 4,143.53

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Solution

The fourth proportional to 12,907.91, 19,365.53 and 4,143.53 is: 6,216.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,907.91 : 19,365.53 = 4,143.53 : x
  2. Step 2: Convert to fraction form
    12,907.91/19,365.53 = 4,143.53/x
  3. Step 3: Cross multiply
    12,907.91x = 19,365.53 × 4,143.53
  4. Step 4: Simplify right side
    12,907.91x = 80,241,536.98
  5. Step 5: Solve for x
    x = 80,241,536.98/12,907.91
  6. Step 6: Final answer
    x = 6,216.46

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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.