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Finding the Fourth Proportional to 28,018.40, 41,962.80 and 19,205.60

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Solution

The fourth proportional to 28,018.40, 41,962.80 and 19,205.60 is: 28,763.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,018.40 : 41,962.80 = 19,205.60 : x
  2. Step 2: Convert to fraction form
    28,018.40/41,962.80 = 19,205.60/x
  3. Step 3: Cross multiply
    28,018.40x = 41,962.80 × 19,205.60
  4. Step 4: Simplify right side
    28,018.40x = 805,920,751.68
  5. Step 5: Solve for x
    x = 805,920,751.68/28,018.40
  6. Step 6: Final answer
    x = 28,763.98

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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.