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Finding the Fourth Proportional to 18,647.52, 25,733.34 and 13,888.77

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Solution

The fourth proportional to 18,647.52, 25,733.34 and 13,888.77 is: 19,166.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,647.52 : 25,733.34 = 13,888.77 : x
  2. Step 2: Convert to fraction form
    18,647.52/25,733.34 = 13,888.77/x
  3. Step 3: Cross multiply
    18,647.52x = 25,733.34 × 13,888.77
  4. Step 4: Simplify right side
    18,647.52x = 357,404,440.59
  5. Step 5: Solve for x
    x = 357,404,440.59/18,647.52
  6. Step 6: Final answer
    x = 19,166.33

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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.