Home / 3,420.47-5,127.49-1,858.18

Finding the Fourth Proportional to 3,420.47, 5,127.49 and 1,858.18

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Solution

The fourth proportional to 3,420.47, 5,127.49 and 1,858.18 is: 2,785.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,420.47 : 5,127.49 = 1,858.18 : x
  2. Step 2: Convert to fraction form
    3,420.47/5,127.49 = 1,858.18/x
  3. Step 3: Cross multiply
    3,420.47x = 5,127.49 × 1,858.18
  4. Step 4: Simplify right side
    3,420.47x = 9,527,799.37
  5. Step 5: Solve for x
    x = 9,527,799.37/3,420.47
  6. Step 6: Final answer
    x = 2,785.52

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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.