Home / 13,858.99-19,125.78-7,890.50

Finding the Fourth Proportional to 13,858.99, 19,125.78 and 7,890.50

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Solution

The fourth proportional to 13,858.99, 19,125.78 and 7,890.50 is: 10,889.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,858.99 : 19,125.78 = 7,890.50 : x
  2. Step 2: Convert to fraction form
    13,858.99/19,125.78 = 7,890.50/x
  3. Step 3: Cross multiply
    13,858.99x = 19,125.78 × 7,890.50
  4. Step 4: Simplify right side
    13,858.99x = 150,911,967.09
  5. Step 5: Solve for x
    x = 150,911,967.09/13,858.99
  6. Step 6: Final answer
    x = 10,889.10

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.