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Finding the Fourth Proportional to 28,760.07, 39,686.07 and 16,821.08

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Solution

The fourth proportional to 28,760.07, 39,686.07 and 16,821.08 is: 23,211.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,760.07 : 39,686.07 = 16,821.08 : x
  2. Step 2: Convert to fraction form
    28,760.07/39,686.07 = 16,821.08/x
  3. Step 3: Cross multiply
    28,760.07x = 39,686.07 × 16,821.08
  4. Step 4: Simplify right side
    28,760.07x = 667,562,275.82
  5. Step 5: Solve for x
    x = 667,562,275.82/28,760.07
  6. Step 6: Final answer
    x = 23,211.43

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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.