Home / 13,116.90-18,100.79-7,148.44

Finding the Fourth Proportional to 13,116.90, 18,100.79 and 7,148.44

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Solution

The fourth proportional to 13,116.90, 18,100.79 and 7,148.44 is: 9,864.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,116.90 : 18,100.79 = 7,148.44 : x
  2. Step 2: Convert to fraction form
    13,116.90/18,100.79 = 7,148.44/x
  3. Step 3: Cross multiply
    13,116.90x = 18,100.79 × 7,148.44
  4. Step 4: Simplify right side
    13,116.90x = 129,392,431.23
  5. Step 5: Solve for x
    x = 129,392,431.23/13,116.90
  6. Step 6: Final answer
    x = 9,864.56

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.