Home / 13,122.65-18,109.36-7,154.36

Finding the Fourth Proportional to 13,122.65, 18,109.36 and 7,154.36

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Solution

The fourth proportional to 13,122.65, 18,109.36 and 7,154.36 is: 9,873.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,122.65 : 18,109.36 = 7,154.36 : x
  2. Step 2: Convert to fraction form
    13,122.65/18,109.36 = 7,154.36/x
  3. Step 3: Cross multiply
    13,122.65x = 18,109.36 × 7,154.36
  4. Step 4: Simplify right side
    13,122.65x = 129,560,796.22
  5. Step 5: Solve for x
    x = 129,560,796.22/13,122.65
  6. Step 6: Final answer
    x = 9,873.07

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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.