Home / 13,139.49-19,709.34-4,374.36

Finding the Fourth Proportional to 13,139.49, 19,709.34 and 4,374.36

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Solution

The fourth proportional to 13,139.49, 19,709.34 and 4,374.36 is: 6,561.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,139.49 : 19,709.34 = 4,374.36 : x
  2. Step 2: Convert to fraction form
    13,139.49/19,709.34 = 4,374.36/x
  3. Step 3: Cross multiply
    13,139.49x = 19,709.34 × 4,374.36
  4. Step 4: Simplify right side
    13,139.49x = 86,215,748.52
  5. Step 5: Solve for x
    x = 86,215,748.52/13,139.49
  6. Step 6: Final answer
    x = 6,561.57

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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.