Home / 12,957.20-19,430.92-4,189.76

Finding the Fourth Proportional to 12,957.20, 19,430.92 and 4,189.76

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Solution

The fourth proportional to 12,957.20, 19,430.92 and 4,189.76 is: 6,283.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,957.20 : 19,430.92 = 4,189.76 : x
  2. Step 2: Convert to fraction form
    12,957.20/19,430.92 = 4,189.76/x
  3. Step 3: Cross multiply
    12,957.20x = 19,430.92 × 4,189.76
  4. Step 4: Simplify right side
    12,957.20x = 81,410,891.38
  5. Step 5: Solve for x
    x = 81,410,891.38/12,957.20
  6. Step 6: Final answer
    x = 6,283.06

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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.