Home / 28,680.45-39,567.96-21,144.69

Finding the Fourth Proportional to 28,680.45, 39,567.96 and 21,144.69

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Solution

The fourth proportional to 28,680.45, 39,567.96 and 21,144.69 is: 29,171.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,680.45 : 39,567.96 = 21,144.69 : x
  2. Step 2: Convert to fraction form
    28,680.45/39,567.96 = 21,144.69/x
  3. Step 3: Cross multiply
    28,680.45x = 39,567.96 × 21,144.69
  4. Step 4: Simplify right side
    28,680.45x = 836,652,248.13
  5. Step 5: Solve for x
    x = 836,652,248.13/28,680.45
  6. Step 6: Final answer
    x = 29,171.52

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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.