Home / 13,686.90-18,887.92-7,399.27

Finding the Fourth Proportional to 13,686.90, 18,887.92 and 7,399.27

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Solution

The fourth proportional to 13,686.90, 18,887.92 and 7,399.27 is: 10,210.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,686.90 : 18,887.92 = 7,399.27 : x
  2. Step 2: Convert to fraction form
    13,686.90/18,887.92 = 7,399.27/x
  3. Step 3: Cross multiply
    13,686.90x = 18,887.92 × 7,399.27
  4. Step 4: Simplify right side
    13,686.90x = 139,756,824.93
  5. Step 5: Solve for x
    x = 139,756,824.93/13,686.90
  6. Step 6: Final answer
    x = 10,210.99

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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.