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Finding the Fourth Proportional to 18,999.88, 28,498.94 and 12,762.52

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Solution

The fourth proportional to 18,999.88, 28,498.94 and 12,762.52 is: 19,143.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,999.88 : 28,498.94 = 12,762.52 : x
  2. Step 2: Convert to fraction form
    18,999.88/28,498.94 = 12,762.52/x
  3. Step 3: Cross multiply
    18,999.88x = 28,498.94 × 12,762.52
  4. Step 4: Simplify right side
    18,999.88x = 363,718,291.73
  5. Step 5: Solve for x
    x = 363,718,291.73/18,999.88
  6. Step 6: Final answer
    x = 19,143.19

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.