Home / 5,178.47-7,147.65-3,190.68

Finding the Fourth Proportional to 5,178.47, 7,147.65 and 3,190.68

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Solution

The fourth proportional to 5,178.47, 7,147.65 and 3,190.68 is: 4,403.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,178.47 : 7,147.65 = 3,190.68 : x
  2. Step 2: Convert to fraction form
    5,178.47/7,147.65 = 3,190.68/x
  3. Step 3: Cross multiply
    5,178.47x = 7,147.65 × 3,190.68
  4. Step 4: Simplify right side
    5,178.47x = 22,805,875.87
  5. Step 5: Solve for x
    x = 22,805,875.87/5,178.47
  6. Step 6: Final answer
    x = 4,403.98

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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.