Home / 13,686.84-18,887.89-7,399.26

Finding the Fourth Proportional to 13,686.84, 18,887.89 and 7,399.26

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Solution

The fourth proportional to 13,686.84, 18,887.89 and 7,399.26 is: 10,211.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,686.84 : 18,887.89 = 7,399.26 : x
  2. Step 2: Convert to fraction form
    13,686.84/18,887.89 = 7,399.26/x
  3. Step 3: Cross multiply
    13,686.84x = 18,887.89 × 7,399.26
  4. Step 4: Simplify right side
    13,686.84x = 139,756,475.17
  5. Step 5: Solve for x
    x = 139,756,475.17/13,686.84
  6. Step 6: Final answer
    x = 10,211.01

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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.