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Finding the Fourth Proportional to 28,413.55, 42,618.78 and 8,692.11

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Solution

The fourth proportional to 28,413.55, 42,618.78 and 8,692.11 is: 13,037.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,413.55 : 42,618.78 = 8,692.11 : x
  2. Step 2: Convert to fraction form
    28,413.55/42,618.78 = 8,692.11/x
  3. Step 3: Cross multiply
    28,413.55x = 42,618.78 × 8,692.11
  4. Step 4: Simplify right side
    28,413.55x = 370,446,995.81
  5. Step 5: Solve for x
    x = 370,446,995.81/28,413.55
  6. Step 6: Final answer
    x = 13,037.69

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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.