Home / 12,157.54-16,776.45-7,121.11

Finding the Fourth Proportional to 12,157.54, 16,776.45 and 7,121.11

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Solution

The fourth proportional to 12,157.54, 16,776.45 and 7,121.11 is: 9,826.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,157.54 : 16,776.45 = 7,121.11 : x
  2. Step 2: Convert to fraction form
    12,157.54/16,776.45 = 7,121.11/x
  3. Step 3: Cross multiply
    12,157.54x = 16,776.45 × 7,121.11
  4. Step 4: Simplify right side
    12,157.54x = 119,466,945.86
  5. Step 5: Solve for x
    x = 119,466,945.86/12,157.54
  6. Step 6: Final answer
    x = 9,826.57

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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.