Home / 20,852.74-28,765.43-13,285.72

Finding the Fourth Proportional to 20,852.74, 28,765.43 and 13,285.72

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Solution

The fourth proportional to 20,852.74, 28,765.43 and 13,285.72 is: 18,327.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,852.74 : 28,765.43 = 13,285.72 : x
  2. Step 2: Convert to fraction form
    20,852.74/28,765.43 = 13,285.72/x
  3. Step 3: Cross multiply
    20,852.74x = 28,765.43 × 13,285.72
  4. Step 4: Simplify right side
    20,852.74x = 382,169,468.01
  5. Step 5: Solve for x
    x = 382,169,468.01/20,852.74
  6. Step 6: Final answer
    x = 18,327.06

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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.