Home / 28,760.47-39,689.60-16,821.47

Finding the Fourth Proportional to 28,760.47, 39,689.60 and 16,821.47

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Solution

The fourth proportional to 28,760.47, 39,689.60 and 16,821.47 is: 23,213.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,760.47 : 39,689.60 = 16,821.47 : x
  2. Step 2: Convert to fraction form
    28,760.47/39,689.60 = 16,821.47/x
  3. Step 3: Cross multiply
    28,760.47x = 39,689.60 × 16,821.47
  4. Step 4: Simplify right side
    28,760.47x = 667,637,430.83
  5. Step 5: Solve for x
    x = 667,637,430.83/28,760.47
  6. Step 6: Final answer
    x = 23,213.72

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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.