Home / 20,661.54-28,511.83-11,709.15

Finding the Fourth Proportional to 20,661.54, 28,511.83 and 11,709.15

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Solution

The fourth proportional to 20,661.54, 28,511.83 and 11,709.15 is: 16,158.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,661.54 : 28,511.83 = 11,709.15 : x
  2. Step 2: Convert to fraction form
    20,661.54/28,511.83 = 11,709.15/x
  3. Step 3: Cross multiply
    20,661.54x = 28,511.83 × 11,709.15
  4. Step 4: Simplify right side
    20,661.54x = 333,849,294.24
  5. Step 5: Solve for x
    x = 333,849,294.24/20,661.54
  6. Step 6: Final answer
    x = 16,158.01

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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.