Home / 12,864.12-17,749.58-8,145.69

Finding the Fourth Proportional to 12,864.12, 17,749.58 and 8,145.69

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Solution

The fourth proportional to 12,864.12, 17,749.58 and 8,145.69 is: 11,239.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,864.12 : 17,749.58 = 8,145.69 : x
  2. Step 2: Convert to fraction form
    12,864.12/17,749.58 = 8,145.69/x
  3. Step 3: Cross multiply
    12,864.12x = 17,749.58 × 8,145.69
  4. Step 4: Simplify right side
    12,864.12x = 144,582,535.58
  5. Step 5: Solve for x
    x = 144,582,535.58/12,864.12
  6. Step 6: Final answer
    x = 11,239.21

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.