Home / 7,781.38-11,670.63-2,585.86

Finding the Fourth Proportional to 7,781.38, 11,670.63 and 2,585.86

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Solution

The fourth proportional to 7,781.38, 11,670.63 and 2,585.86 is: 3,878.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,781.38 : 11,670.63 = 2,585.86 : x
  2. Step 2: Convert to fraction form
    7,781.38/11,670.63 = 2,585.86/x
  3. Step 3: Cross multiply
    7,781.38x = 11,670.63 × 2,585.86
  4. Step 4: Simplify right side
    7,781.38x = 30,178,615.29
  5. Step 5: Solve for x
    x = 30,178,615.29/7,781.38
  6. Step 6: Final answer
    x = 3,878.31

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.