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Finding the Fourth Proportional to 18,603.09, 25,664.76 and 11,886.93

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Solution

The fourth proportional to 18,603.09, 25,664.76 and 11,886.93 is: 16,399.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,603.09 : 25,664.76 = 11,886.93 : x
  2. Step 2: Convert to fraction form
    18,603.09/25,664.76 = 11,886.93/x
  3. Step 3: Cross multiply
    18,603.09x = 25,664.76 × 11,886.93
  4. Step 4: Simplify right side
    18,603.09x = 305,075,205.59
  5. Step 5: Solve for x
    x = 305,075,205.59/18,603.09
  6. Step 6: Final answer
    x = 16,399.17

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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.