Home / 12,905.32-19,360.50-4,139.56

Finding the Fourth Proportional to 12,905.32, 19,360.50 and 4,139.56

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Solution

The fourth proportional to 12,905.32, 19,360.50 and 4,139.56 is: 6,210.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,905.32 : 19,360.50 = 4,139.56 : x
  2. Step 2: Convert to fraction form
    12,905.32/19,360.50 = 4,139.56/x
  3. Step 3: Cross multiply
    12,905.32x = 19,360.50 × 4,139.56
  4. Step 4: Simplify right side
    12,905.32x = 80,143,951.38
  5. Step 5: Solve for x
    x = 80,143,951.38/12,905.32
  6. Step 6: Final answer
    x = 6,210.15

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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.