Home / 12,728.70-19,087.65-6,156.90

Finding the Fourth Proportional to 12,728.70, 19,087.65 and 6,156.90

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Solution

The fourth proportional to 12,728.70, 19,087.65 and 6,156.90 is: 9,232.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,728.70 : 19,087.65 = 6,156.90 : x
  2. Step 2: Convert to fraction form
    12,728.70/19,087.65 = 6,156.90/x
  3. Step 3: Cross multiply
    12,728.70x = 19,087.65 × 6,156.90
  4. Step 4: Simplify right side
    12,728.70x = 117,520,752.29
  5. Step 5: Solve for x
    x = 117,520,752.29/12,728.70
  6. Step 6: Final answer
    x = 9,232.74

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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.