Home / 6,985.86-10,478.80-1,791.74

Finding the Fourth Proportional to 6,985.86, 10,478.80 and 1,791.74

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Solution

The fourth proportional to 6,985.86, 10,478.80 and 1,791.74 is: 2,687.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,985.86 : 10,478.80 = 1,791.74 : x
  2. Step 2: Convert to fraction form
    6,985.86/10,478.80 = 1,791.74/x
  3. Step 3: Cross multiply
    6,985.86x = 10,478.80 × 1,791.74
  4. Step 4: Simplify right side
    6,985.86x = 18,775,244.53
  5. Step 5: Solve for x
    x = 18,775,244.53/6,985.86
  6. Step 6: Final answer
    x = 2,687.61

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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.