Home / 28,428.12-42,660.63-12,845.88

Finding the Fourth Proportional to 28,428.12, 42,660.63 and 12,845.88

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Solution

The fourth proportional to 28,428.12, 42,660.63 and 12,845.88 is: 19,277.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,428.12 : 42,660.63 = 12,845.88 : x
  2. Step 2: Convert to fraction form
    28,428.12/42,660.63 = 12,845.88/x
  3. Step 3: Cross multiply
    28,428.12x = 42,660.63 × 12,845.88
  4. Step 4: Simplify right side
    28,428.12x = 548,013,333.70
  5. Step 5: Solve for x
    x = 548,013,333.70/28,428.12
  6. Step 6: Final answer
    x = 19,277.16

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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.