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Finding the Fourth Proportional to 18,357.77, 25,334.26 and 12,989.82

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Solution

The fourth proportional to 18,357.77, 25,334.26 and 12,989.82 is: 17,926.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,357.77 : 25,334.26 = 12,989.82 : x
  2. Step 2: Convert to fraction form
    18,357.77/25,334.26 = 12,989.82/x
  3. Step 3: Cross multiply
    18,357.77x = 25,334.26 × 12,989.82
  4. Step 4: Simplify right side
    18,357.77x = 329,087,477.23
  5. Step 5: Solve for x
    x = 329,087,477.23/18,357.77
  6. Step 6: Final answer
    x = 17,926.33

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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.