Home / 12,988.35-19,438.79-7,797.87

Finding the Fourth Proportional to 12,988.35, 19,438.79 and 7,797.87

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Solution

The fourth proportional to 12,988.35, 19,438.79 and 7,797.87 is: 11,670.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,988.35 : 19,438.79 = 7,797.87 : x
  2. Step 2: Convert to fraction form
    12,988.35/19,438.79 = 7,797.87/x
  3. Step 3: Cross multiply
    12,988.35x = 19,438.79 × 7,797.87
  4. Step 4: Simplify right side
    12,988.35x = 151,581,118.39
  5. Step 5: Solve for x
    x = 151,581,118.39/12,988.35
  6. Step 6: Final answer
    x = 11,670.54

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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.