Home / 12,169.20-18,240.56-7,953.76

Finding the Fourth Proportional to 12,169.20, 18,240.56 and 7,953.76

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Solution

The fourth proportional to 12,169.20, 18,240.56 and 7,953.76 is: 11,921.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,169.20 : 18,240.56 = 7,953.76 : x
  2. Step 2: Convert to fraction form
    12,169.20/18,240.56 = 7,953.76/x
  3. Step 3: Cross multiply
    12,169.20x = 18,240.56 × 7,953.76
  4. Step 4: Simplify right side
    12,169.20x = 145,081,036.51
  5. Step 5: Solve for x
    x = 145,081,036.51/12,169.20
  6. Step 6: Final answer
    x = 11,921.99

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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.