Home / 18,120.36-25,012.32-11,417.28

Finding the Fourth Proportional to 18,120.36, 25,012.32 and 11,417.28

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Solution

The fourth proportional to 18,120.36, 25,012.32 and 11,417.28 is: 15,759.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,120.36 : 25,012.32 = 11,417.28 : x
  2. Step 2: Convert to fraction form
    18,120.36/25,012.32 = 11,417.28/x
  3. Step 3: Cross multiply
    18,120.36x = 25,012.32 × 11,417.28
  4. Step 4: Simplify right side
    18,120.36x = 285,572,660.89
  5. Step 5: Solve for x
    x = 285,572,660.89/18,120.36
  6. Step 6: Final answer
    x = 15,759.77

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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.