Home / 13,156.42-18,155.56-7,188.12

Finding the Fourth Proportional to 13,156.42, 18,155.56 and 7,188.12

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Solution

The fourth proportional to 13,156.42, 18,155.56 and 7,188.12 is: 9,919.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,156.42 : 18,155.56 = 7,188.12 : x
  2. Step 2: Convert to fraction form
    13,156.42/18,155.56 = 7,188.12/x
  3. Step 3: Cross multiply
    13,156.42x = 18,155.56 × 7,188.12
  4. Step 4: Simplify right side
    13,156.42x = 130,504,343.95
  5. Step 5: Solve for x
    x = 130,504,343.95/13,156.42
  6. Step 6: Final answer
    x = 9,919.44

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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.