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Finding the Fourth Proportional to 39,012, 58,520.16 and 11,312.16

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Solution

The fourth proportional to 39,012, 58,520.16 and 11,312.16 is: 16,968.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,012 : 58,520.16 = 11,312.16 : x
  2. Step 2: Convert to fraction form
    39,012/58,520.16 = 11,312.16/x
  3. Step 3: Cross multiply
    39,012x = 58,520.16 × 11,312.16
  4. Step 4: Simplify right side
    39,012x = 661,989,413.15
  5. Step 5: Solve for x
    x = 661,989,413.15/39,012
  6. Step 6: Final answer
    x = 16,968.87

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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.