Home / 12,783.28-17,645.75-7,479.81

Finding the Fourth Proportional to 12,783.28, 17,645.75 and 7,479.81

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Solution

The fourth proportional to 12,783.28, 17,645.75 and 7,479.81 is: 10,324.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,783.28 : 17,645.75 = 7,479.81 : x
  2. Step 2: Convert to fraction form
    12,783.28/17,645.75 = 7,479.81/x
  3. Step 3: Cross multiply
    12,783.28x = 17,645.75 × 7,479.81
  4. Step 4: Simplify right side
    12,783.28x = 131,986,775.79
  5. Step 5: Solve for x
    x = 131,986,775.79/12,783.28
  6. Step 6: Final answer
    x = 10,324.95

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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.