Home / 13,157.27-18,151.11-8,121.69

Finding the Fourth Proportional to 13,157.27, 18,151.11 and 8,121.69

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Solution

The fourth proportional to 13,157.27, 18,151.11 and 8,121.69 is: 11,204.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,157.27 : 18,151.11 = 8,121.69 : x
  2. Step 2: Convert to fraction form
    13,157.27/18,151.11 = 8,121.69/x
  3. Step 3: Cross multiply
    13,157.27x = 18,151.11 × 8,121.69
  4. Step 4: Simplify right side
    13,157.27x = 147,417,688.58
  5. Step 5: Solve for x
    x = 147,417,688.58/13,157.27
  6. Step 6: Final answer
    x = 11,204.28

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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.