Home / 20,851.75-28,775.62-12,468.25

Finding the Fourth Proportional to 20,851.75, 28,775.62 and 12,468.25

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Solution

The fourth proportional to 20,851.75, 28,775.62 and 12,468.25 is: 17,206.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,851.75 : 28,775.62 = 12,468.25 : x
  2. Step 2: Convert to fraction form
    20,851.75/28,775.62 = 12,468.25/x
  3. Step 3: Cross multiply
    20,851.75x = 28,775.62 × 12,468.25
  4. Step 4: Simplify right side
    20,851.75x = 358,781,592.89
  5. Step 5: Solve for x
    x = 358,781,592.89/20,851.75
  6. Step 6: Final answer
    x = 17,206.31

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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.