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Finding the Fourth Proportional to 38,413.80, 57,620.70 and 28,045.80

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Solution

The fourth proportional to 38,413.80, 57,620.70 and 28,045.80 is: 42,068.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,413.80 : 57,620.70 = 28,045.80 : x
  2. Step 2: Convert to fraction form
    38,413.80/57,620.70 = 28,045.80/x
  3. Step 3: Cross multiply
    38,413.80x = 57,620.70 × 28,045.80
  4. Step 4: Simplify right side
    38,413.80x = 1,616,018,628.06
  5. Step 5: Solve for x
    x = 1,616,018,628.06/38,413.80
  6. Step 6: Final answer
    x = 42,068.70

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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.