Home / 12,129.81-18,194.71-5,458.51

Finding the Fourth Proportional to 12,129.81, 18,194.71 and 5,458.51

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Solution

The fourth proportional to 12,129.81, 18,194.71 and 5,458.51 is: 8,187.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,129.81 : 18,194.71 = 5,458.51 : x
  2. Step 2: Convert to fraction form
    12,129.81/18,194.71 = 5,458.51/x
  3. Step 3: Cross multiply
    12,129.81x = 18,194.71 × 5,458.51
  4. Step 4: Simplify right side
    12,129.81x = 99,316,006.48
  5. Step 5: Solve for x
    x = 99,316,006.48/12,129.81
  6. Step 6: Final answer
    x = 8,187.76

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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.