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Finding the Fourth Proportional to 12,675.90, 19,011.15 and 5,655.90

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Solution

The fourth proportional to 12,675.90, 19,011.15 and 5,655.90 is: 8,482.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,675.90 : 19,011.15 = 5,655.90 : x
  2. Step 2: Convert to fraction form
    12,675.90/19,011.15 = 5,655.90/x
  3. Step 3: Cross multiply
    12,675.90x = 19,011.15 × 5,655.90
  4. Step 4: Simplify right side
    12,675.90x = 107,525,163.29
  5. Step 5: Solve for x
    x = 107,525,163.29/12,675.90
  6. Step 6: Final answer
    x = 8,482.65

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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.