Home / 18,395.40-25,369.56-12,720.14

Finding the Fourth Proportional to 18,395.40, 25,369.56 and 12,720.14

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Solution

The fourth proportional to 18,395.40, 25,369.56 and 12,720.14 is: 17,542.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,395.40 : 25,369.56 = 12,720.14 : x
  2. Step 2: Convert to fraction form
    18,395.40/25,369.56 = 12,720.14/x
  3. Step 3: Cross multiply
    18,395.40x = 25,369.56 × 12,720.14
  4. Step 4: Simplify right side
    18,395.40x = 322,704,228.09
  5. Step 5: Solve for x
    x = 322,704,228.09/18,395.40
  6. Step 6: Final answer
    x = 17,542.66

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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.