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Finding the Fourth Proportional to 20,846.49, 28,770.95 and 12,347.95

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Solution

The fourth proportional to 20,846.49, 28,770.95 and 12,347.95 is: 17,041.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,846.49 : 28,770.95 = 12,347.95 : x
  2. Step 2: Convert to fraction form
    20,846.49/28,770.95 = 12,347.95/x
  3. Step 3: Cross multiply
    20,846.49x = 28,770.95 × 12,347.95
  4. Step 4: Simplify right side
    20,846.49x = 355,262,252.05
  5. Step 5: Solve for x
    x = 355,262,252.05/20,846.49
  6. Step 6: Final answer
    x = 17,041.83

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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.