Home / 15,007.20-20,708.85-8,292.75

Finding the Fourth Proportional to 15,007.20, 20,708.85 and 8,292.75

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Solution

The fourth proportional to 15,007.20, 20,708.85 and 8,292.75 is: 11,443.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,007.20 : 20,708.85 = 8,292.75 : x
  2. Step 2: Convert to fraction form
    15,007.20/20,708.85 = 8,292.75/x
  3. Step 3: Cross multiply
    15,007.20x = 20,708.85 × 8,292.75
  4. Step 4: Simplify right side
    15,007.20x = 171,733,315.84
  5. Step 5: Solve for x
    x = 171,733,315.84/15,007.20
  6. Step 6: Final answer
    x = 11,443.39

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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.