Home / 13,142.01-18,135.68-7,173.78

Finding the Fourth Proportional to 13,142.01, 18,135.68 and 7,173.78

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Solution

The fourth proportional to 13,142.01, 18,135.68 and 7,173.78 is: 9,899.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,142.01 : 18,135.68 = 7,173.78 : x
  2. Step 2: Convert to fraction form
    13,142.01/18,135.68 = 7,173.78/x
  3. Step 3: Cross multiply
    13,142.01x = 18,135.68 × 7,173.78
  4. Step 4: Simplify right side
    13,142.01x = 130,101,416.96
  5. Step 5: Solve for x
    x = 130,101,416.96/13,142.01
  6. Step 6: Final answer
    x = 9,899.66

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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.