Home / 12,127.13-18,189.47-3,807.21

Finding the Fourth Proportional to 12,127.13, 18,189.47 and 3,807.21

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Solution

The fourth proportional to 12,127.13, 18,189.47 and 3,807.21 is: 5,710.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,127.13 : 18,189.47 = 3,807.21 : x
  2. Step 2: Convert to fraction form
    12,127.13/18,189.47 = 3,807.21/x
  3. Step 3: Cross multiply
    12,127.13x = 18,189.47 × 3,807.21
  4. Step 4: Simplify right side
    12,127.13x = 69,251,113.04
  5. Step 5: Solve for x
    x = 69,251,113.04/12,127.13
  6. Step 6: Final answer
    x = 5,710.43

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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.