Home / 9,147.80-13,721.16-5,638.48

Finding the Fourth Proportional to 9,147.80, 13,721.16 and 5,638.48

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Solution

The fourth proportional to 9,147.80, 13,721.16 and 5,638.48 is: 8,457.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,147.80 : 13,721.16 = 5,638.48 : x
  2. Step 2: Convert to fraction form
    9,147.80/13,721.16 = 5,638.48/x
  3. Step 3: Cross multiply
    9,147.80x = 13,721.16 × 5,638.48
  4. Step 4: Simplify right side
    9,147.80x = 77,366,486.24
  5. Step 5: Solve for x
    x = 77,366,486.24/9,147.80
  6. Step 6: Final answer
    x = 8,457.39

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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.