Home / 13,688.85-18,890.65-7,401.27

Finding the Fourth Proportional to 13,688.85, 18,890.65 and 7,401.27

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Solution

The fourth proportional to 13,688.85, 18,890.65 and 7,401.27 is: 10,213.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,688.85 : 18,890.65 = 7,401.27 : x
  2. Step 2: Convert to fraction form
    13,688.85/18,890.65 = 7,401.27/x
  3. Step 3: Cross multiply
    13,688.85x = 18,890.65 × 7,401.27
  4. Step 4: Simplify right side
    13,688.85x = 139,814,801.13
  5. Step 5: Solve for x
    x = 139,814,801.13/13,688.85
  6. Step 6: Final answer
    x = 10,213.77

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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.