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Finding the Fourth Proportional to 28,482.63, 42,729.41 and 12,900.25

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Solution

The fourth proportional to 28,482.63, 42,729.41 and 12,900.25 is: 19,352.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,482.63 : 42,729.41 = 12,900.25 : x
  2. Step 2: Convert to fraction form
    28,482.63/42,729.41 = 12,900.25/x
  3. Step 3: Cross multiply
    28,482.63x = 42,729.41 × 12,900.25
  4. Step 4: Simplify right side
    28,482.63x = 551,220,071.35
  5. Step 5: Solve for x
    x = 551,220,071.35/28,482.63
  6. Step 6: Final answer
    x = 19,352.85

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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.