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Finding the Fourth Proportional to 28,490.80, 42,768.60 and 16,810.60

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Solution

The fourth proportional to 28,490.80, 42,768.60 and 16,810.60 is: 25,235.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,490.80 : 42,768.60 = 16,810.60 : x
  2. Step 2: Convert to fraction form
    28,490.80/42,768.60 = 16,810.60/x
  3. Step 3: Cross multiply
    28,490.80x = 42,768.60 × 16,810.60
  4. Step 4: Simplify right side
    28,490.80x = 718,965,827.16
  5. Step 5: Solve for x
    x = 718,965,827.16/28,490.80
  6. Step 6: Final answer
    x = 25,235.02

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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.