Home / 12,936.32-19,404.60-5,145.20

Finding the Fourth Proportional to 12,936.32, 19,404.60 and 5,145.20

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Solution

The fourth proportional to 12,936.32, 19,404.60 and 5,145.20 is: 7,717.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,936.32 : 19,404.60 = 5,145.20 : x
  2. Step 2: Convert to fraction form
    12,936.32/19,404.60 = 5,145.20/x
  3. Step 3: Cross multiply
    12,936.32x = 19,404.60 × 5,145.20
  4. Step 4: Simplify right side
    12,936.32x = 99,840,547.92
  5. Step 5: Solve for x
    x = 99,840,547.92/12,936.32
  6. Step 6: Final answer
    x = 7,717.85

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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.