Home / 28,516.78-42,782.46-11,871.28

Finding the Fourth Proportional to 28,516.78, 42,782.46 and 11,871.28

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Solution

The fourth proportional to 28,516.78, 42,782.46 and 11,871.28 is: 17,809.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,516.78 : 42,782.46 = 11,871.28 : x
  2. Step 2: Convert to fraction form
    28,516.78/42,782.46 = 11,871.28/x
  3. Step 3: Cross multiply
    28,516.78x = 42,782.46 × 11,871.28
  4. Step 4: Simplify right side
    28,516.78x = 507,882,561.75
  5. Step 5: Solve for x
    x = 507,882,561.75/28,516.78
  6. Step 6: Final answer
    x = 17,809.95

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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.