Home / 20,661.16-28,511.81-11,709.50

Finding the Fourth Proportional to 20,661.16, 28,511.81 and 11,709.50

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Solution

The fourth proportional to 20,661.16, 28,511.81 and 11,709.50 is: 16,158.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,661.16 : 28,511.81 = 11,709.50 : x
  2. Step 2: Convert to fraction form
    20,661.16/28,511.81 = 11,709.50/x
  3. Step 3: Cross multiply
    20,661.16x = 28,511.81 × 11,709.50
  4. Step 4: Simplify right side
    20,661.16x = 333,859,039.20
  5. Step 5: Solve for x
    x = 333,859,039.20/20,661.16
  6. Step 6: Final answer
    x = 16,158.78

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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.