Home / 20,866.57-28,795.86-11,435.34

Finding the Fourth Proportional to 20,866.57, 28,795.86 and 11,435.34

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Solution

The fourth proportional to 20,866.57, 28,795.86 and 11,435.34 is: 15,780.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,866.57 : 28,795.86 = 11,435.34 : x
  2. Step 2: Convert to fraction form
    20,866.57/28,795.86 = 11,435.34/x
  3. Step 3: Cross multiply
    20,866.57x = 28,795.86 × 11,435.34
  4. Step 4: Simplify right side
    20,866.57x = 329,290,449.69
  5. Step 5: Solve for x
    x = 329,290,449.69/20,866.57
  6. Step 6: Final answer
    x = 15,780.77

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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.