Home / 15,011.12-20,716.24-8,639.76

Finding the Fourth Proportional to 15,011.12, 20,716.24 and 8,639.76

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Solution

The fourth proportional to 15,011.12, 20,716.24 and 8,639.76 is: 11,923.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,011.12 : 20,716.24 = 8,639.76 : x
  2. Step 2: Convert to fraction form
    15,011.12/20,716.24 = 8,639.76/x
  3. Step 3: Cross multiply
    15,011.12x = 20,716.24 × 8,639.76
  4. Step 4: Simplify right side
    15,011.12x = 178,983,341.70
  5. Step 5: Solve for x
    x = 178,983,341.70/15,011.12
  6. Step 6: Final answer
    x = 11,923.38

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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.