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Finding the Fourth Proportional to 28,450.80, 42,640.20 and 10,897.20

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Solution

The fourth proportional to 28,450.80, 42,640.20 and 10,897.20 is: 16,332.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,450.80 : 42,640.20 = 10,897.20 : x
  2. Step 2: Convert to fraction form
    28,450.80/42,640.20 = 10,897.20/x
  3. Step 3: Cross multiply
    28,450.80x = 42,640.20 × 10,897.20
  4. Step 4: Simplify right side
    28,450.80x = 464,658,787.44
  5. Step 5: Solve for x
    x = 464,658,787.44/28,450.80
  6. Step 6: Final answer
    x = 16,332.01

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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.