Home / 13,131.24-18,108.90-10,142.60

Finding the Fourth Proportional to 13,131.24, 18,108.90 and 10,142.60

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Solution

The fourth proportional to 13,131.24, 18,108.90 and 10,142.60 is: 13,987.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,131.24 : 18,108.90 = 10,142.60 : x
  2. Step 2: Convert to fraction form
    13,131.24/18,108.90 = 10,142.60/x
  3. Step 3: Cross multiply
    13,131.24x = 18,108.90 × 10,142.60
  4. Step 4: Simplify right side
    13,131.24x = 183,671,329.14
  5. Step 5: Solve for x
    x = 183,671,329.14/13,131.24
  6. Step 6: Final answer
    x = 13,987.36

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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.