Home / 12,139.19-18,210.70-4,243.89

Finding the Fourth Proportional to 12,139.19, 18,210.70 and 4,243.89

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Solution

The fourth proportional to 12,139.19, 18,210.70 and 4,243.89 is: 6,366.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,139.19 : 18,210.70 = 4,243.89 : x
  2. Step 2: Convert to fraction form
    12,139.19/18,210.70 = 4,243.89/x
  3. Step 3: Cross multiply
    12,139.19x = 18,210.70 × 4,243.89
  4. Step 4: Simplify right side
    12,139.19x = 77,284,207.62
  5. Step 5: Solve for x
    x = 77,284,207.62/12,139.19
  6. Step 6: Final answer
    x = 6,366.51

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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.