Home / 13,121.08-19,678.02-7,851.94

Finding the Fourth Proportional to 13,121.08, 19,678.02 and 7,851.94

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Solution

The fourth proportional to 13,121.08, 19,678.02 and 7,851.94 is: 11,775.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,121.08 : 19,678.02 = 7,851.94 : x
  2. Step 2: Convert to fraction form
    13,121.08/19,678.02 = 7,851.94/x
  3. Step 3: Cross multiply
    13,121.08x = 19,678.02 × 7,851.94
  4. Step 4: Simplify right side
    13,121.08x = 154,510,632.36
  5. Step 5: Solve for x
    x = 154,510,632.36/13,121.08
  6. Step 6: Final answer
    x = 11,775.76

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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.