Home / 13,156.89-18,157.74-7,189.44

Finding the Fourth Proportional to 13,156.89, 18,157.74 and 7,189.44

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Solution

The fourth proportional to 13,156.89, 18,157.74 and 7,189.44 is: 9,922.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,156.89 : 18,157.74 = 7,189.44 : x
  2. Step 2: Convert to fraction form
    13,156.89/18,157.74 = 7,189.44/x
  3. Step 3: Cross multiply
    13,156.89x = 18,157.74 × 7,189.44
  4. Step 4: Simplify right side
    13,156.89x = 130,543,989.35
  5. Step 5: Solve for x
    x = 130,543,989.35/13,156.89
  6. Step 6: Final answer
    x = 9,922.10

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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.