Home / 10,938.80-16,391.40-8,152.40

Finding the Fourth Proportional to 10,938.80, 16,391.40 and 8,152.40

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Solution

The fourth proportional to 10,938.80, 16,391.40 and 8,152.40 is: 12,216.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,938.80 : 16,391.40 = 8,152.40 : x
  2. Step 2: Convert to fraction form
    10,938.80/16,391.40 = 8,152.40/x
  3. Step 3: Cross multiply
    10,938.80x = 16,391.40 × 8,152.40
  4. Step 4: Simplify right side
    10,938.80x = 133,629,249.36
  5. Step 5: Solve for x
    x = 133,629,249.36/10,938.80
  6. Step 6: Final answer
    x = 12,216.08

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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.