Home / 20,435.16-28,205.88-11,485.56

Finding the Fourth Proportional to 20,435.16, 28,205.88 and 11,485.56

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Solution

The fourth proportional to 20,435.16, 28,205.88 and 11,485.56 is: 15,853.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,435.16 : 28,205.88 = 11,485.56 : x
  2. Step 2: Convert to fraction form
    20,435.16/28,205.88 = 11,485.56/x
  3. Step 3: Cross multiply
    20,435.16x = 28,205.88 × 11,485.56
  4. Step 4: Simplify right side
    20,435.16x = 323,960,327.09
  5. Step 5: Solve for x
    x = 323,960,327.09/20,435.16
  6. Step 6: Final answer
    x = 15,853.08

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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.