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Finding the Fourth Proportional to 12,945.26, 17,870.93 and 8,475.86

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Solution

The fourth proportional to 12,945.26, 17,870.93 and 8,475.86 is: 11,700.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,945.26 : 17,870.93 = 8,475.86 : x
  2. Step 2: Convert to fraction form
    12,945.26/17,870.93 = 8,475.86/x
  3. Step 3: Cross multiply
    12,945.26x = 17,870.93 × 8,475.86
  4. Step 4: Simplify right side
    12,945.26x = 151,471,500.75
  5. Step 5: Solve for x
    x = 151,471,500.75/12,945.26
  6. Step 6: Final answer
    x = 11,700.92

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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.