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Finding the Fourth Proportional to 28,806.77, 39,760.85 and 18,762.77

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Solution

The fourth proportional to 28,806.77, 39,760.85 and 18,762.77 is: 25,897.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,806.77 : 39,760.85 = 18,762.77 : x
  2. Step 2: Convert to fraction form
    28,806.77/39,760.85 = 18,762.77/x
  3. Step 3: Cross multiply
    28,806.77x = 39,760.85 × 18,762.77
  4. Step 4: Simplify right side
    28,806.77x = 746,023,531.66
  5. Step 5: Solve for x
    x = 746,023,531.66/28,806.77
  6. Step 6: Final answer
    x = 25,897.51

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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.