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Finding the Fourth Proportional to 28,525.94, 42,799.12 and 12,729.58

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Solution

The fourth proportional to 28,525.94, 42,799.12 and 12,729.58 is: 19,098.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,525.94 : 42,799.12 = 12,729.58 : x
  2. Step 2: Convert to fraction form
    28,525.94/42,799.12 = 12,729.58/x
  3. Step 3: Cross multiply
    28,525.94x = 42,799.12 × 12,729.58
  4. Step 4: Simplify right side
    28,525.94x = 544,814,821.97
  5. Step 5: Solve for x
    x = 544,814,821.97/28,525.94
  6. Step 6: Final answer
    x = 19,098.93

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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.