Home / 13,688.88-18,890.68-7,401.26

Finding the Fourth Proportional to 13,688.88, 18,890.68 and 7,401.26

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Solution

The fourth proportional to 13,688.88, 18,890.68 and 7,401.26 is: 10,213.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,688.88 : 18,890.68 = 7,401.26 : x
  2. Step 2: Convert to fraction form
    13,688.88/18,890.68 = 7,401.26/x
  3. Step 3: Cross multiply
    13,688.88x = 18,890.68 × 7,401.26
  4. Step 4: Simplify right side
    13,688.88x = 139,814,834.26
  5. Step 5: Solve for x
    x = 139,814,834.26/13,688.88
  6. Step 6: Final answer
    x = 10,213.75

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1.5x scale

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.