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Finding the Fourth Proportional to 28,425.88, 39,230.58 and 16,491.88

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Solution

The fourth proportional to 28,425.88, 39,230.58 and 16,491.88 is: 22,760.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,425.88 : 39,230.58 = 16,491.88 : x
  2. Step 2: Convert to fraction form
    28,425.88/39,230.58 = 16,491.88/x
  3. Step 3: Cross multiply
    28,425.88x = 39,230.58 × 16,491.88
  4. Step 4: Simplify right side
    28,425.88x = 646,986,017.69
  5. Step 5: Solve for x
    x = 646,986,017.69/28,425.88
  6. Step 6: Final answer
    x = 22,760.46

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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.