Home / 6,985.76-10,478.40-1,791.68

Finding the Fourth Proportional to 6,985.76, 10,478.40 and 1,791.68

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Solution

The fourth proportional to 6,985.76, 10,478.40 and 1,791.68 is: 2,687.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,985.76 : 10,478.40 = 1,791.68 : x
  2. Step 2: Convert to fraction form
    6,985.76/10,478.40 = 1,791.68/x
  3. Step 3: Cross multiply
    6,985.76x = 10,478.40 × 1,791.68
  4. Step 4: Simplify right side
    6,985.76x = 18,773,939.71
  5. Step 5: Solve for x
    x = 18,773,939.71/6,985.76
  6. Step 6: Final answer
    x = 2,687.46

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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.