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Finding the Fourth Proportional to 12,605.42, 18,908.13 and 12,587.20

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Solution

The fourth proportional to 12,605.42, 18,908.13 and 12,587.20 is: 18,880.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,605.42 : 18,908.13 = 12,587.20 : x
  2. Step 2: Convert to fraction form
    12,605.42/18,908.13 = 12,587.20/x
  3. Step 3: Cross multiply
    12,605.42x = 18,908.13 × 12,587.20
  4. Step 4: Simplify right side
    12,605.42x = 238,000,413.87
  5. Step 5: Solve for x
    x = 238,000,413.87/12,605.42
  6. Step 6: Final answer
    x = 18,880.80

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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.