Home / 8,139.72-11,230.86-4,781.40

Finding the Fourth Proportional to 8,139.72, 11,230.86 and 4,781.40

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Solution

The fourth proportional to 8,139.72, 11,230.86 and 4,781.40 is: 6,597.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,139.72 : 11,230.86 = 4,781.40 : x
  2. Step 2: Convert to fraction form
    8,139.72/11,230.86 = 4,781.40/x
  3. Step 3: Cross multiply
    8,139.72x = 11,230.86 × 4,781.40
  4. Step 4: Simplify right side
    8,139.72x = 53,699,234.00
  5. Step 5: Solve for x
    x = 53,699,234.00/8,139.72
  6. Step 6: Final answer
    x = 6,597.18

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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.