Home / 10,109.40-15,169.36-7,643.49

Finding the Fourth Proportional to 10,109.40, 15,169.36 and 7,643.49

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Solution

The fourth proportional to 10,109.40, 15,169.36 and 7,643.49 is: 11,469.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,109.40 : 15,169.36 = 7,643.49 : x
  2. Step 2: Convert to fraction form
    10,109.40/15,169.36 = 7,643.49/x
  3. Step 3: Cross multiply
    10,109.40x = 15,169.36 × 7,643.49
  4. Step 4: Simplify right side
    10,109.40x = 115,946,851.47
  5. Step 5: Solve for x
    x = 115,946,851.47/10,109.40
  6. Step 6: Final answer
    x = 11,469.21

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1.5x scale

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.