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Finding the Fourth Proportional to 28,123.40, 42,185.10 and 8,401.32

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Solution

The fourth proportional to 28,123.40, 42,185.10 and 8,401.32 is: 12,601.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,123.40 : 42,185.10 = 8,401.32 : x
  2. Step 2: Convert to fraction form
    28,123.40/42,185.10 = 8,401.32/x
  3. Step 3: Cross multiply
    28,123.40x = 42,185.10 × 8,401.32
  4. Step 4: Simplify right side
    28,123.40x = 354,410,555.84
  5. Step 5: Solve for x
    x = 354,410,555.84/28,123.40
  6. Step 6: Final answer
    x = 12,601.98

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.