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Finding the Fourth Proportional to 12,917.88, 19,373.18 and 7,373.84

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Solution

The fourth proportional to 12,917.88, 19,373.18 and 7,373.84 is: 11,058.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,917.88 : 19,373.18 = 7,373.84 : x
  2. Step 2: Convert to fraction form
    12,917.88/19,373.18 = 7,373.84/x
  3. Step 3: Cross multiply
    12,917.88x = 19,373.18 × 7,373.84
  4. Step 4: Simplify right side
    12,917.88x = 142,854,595.88
  5. Step 5: Solve for x
    x = 142,854,595.88/12,917.88
  6. Step 6: Final answer
    x = 11,058.67

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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.