Home / 11,938.72-17,880.80-5,703.12

Finding the Fourth Proportional to 11,938.72, 17,880.80 and 5,703.12

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Solution

The fourth proportional to 11,938.72, 17,880.80 and 5,703.12 is: 8,541.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,938.72 : 17,880.80 = 5,703.12 : x
  2. Step 2: Convert to fraction form
    11,938.72/17,880.80 = 5,703.12/x
  3. Step 3: Cross multiply
    11,938.72x = 17,880.80 × 5,703.12
  4. Step 4: Simplify right side
    11,938.72x = 101,976,348.10
  5. Step 5: Solve for x
    x = 101,976,348.10/11,938.72
  6. Step 6: Final answer
    x = 8,541.65

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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.