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Finding the Fourth Proportional to 28,605.76, 39,478.10 and 18,004.48

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Solution

The fourth proportional to 28,605.76, 39,478.10 and 18,004.48 is: 24,847.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,605.76 : 39,478.10 = 18,004.48 : x
  2. Step 2: Convert to fraction form
    28,605.76/39,478.10 = 18,004.48/x
  3. Step 3: Cross multiply
    28,605.76x = 39,478.10 × 18,004.48
  4. Step 4: Simplify right side
    28,605.76x = 710,782,661.89
  5. Step 5: Solve for x
    x = 710,782,661.89/28,605.76
  6. Step 6: Final answer
    x = 24,847.54

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.