Home / 12,730.88-17,568.96-7,142.40

Finding the Fourth Proportional to 12,730.88, 17,568.96 and 7,142.40

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Solution

The fourth proportional to 12,730.88, 17,568.96 and 7,142.40 is: 9,856.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,730.88 : 17,568.96 = 7,142.40 : x
  2. Step 2: Convert to fraction form
    12,730.88/17,568.96 = 7,142.40/x
  3. Step 3: Cross multiply
    12,730.88x = 17,568.96 × 7,142.40
  4. Step 4: Simplify right side
    12,730.88x = 125,484,539.90
  5. Step 5: Solve for x
    x = 125,484,539.90/12,730.88
  6. Step 6: Final answer
    x = 9,856.71

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.