Home / 21,579.04-29,778.88-12,147.36

Finding the Fourth Proportional to 21,579.04, 29,778.88 and 12,147.36

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Solution

The fourth proportional to 21,579.04, 29,778.88 and 12,147.36 is: 16,763.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,579.04 : 29,778.88 = 12,147.36 : x
  2. Step 2: Convert to fraction form
    21,579.04/29,778.88 = 12,147.36/x
  3. Step 3: Cross multiply
    21,579.04x = 29,778.88 × 12,147.36
  4. Step 4: Simplify right side
    21,579.04x = 361,734,775.76
  5. Step 5: Solve for x
    x = 361,734,775.76/21,579.04
  6. Step 6: Final answer
    x = 16,763.25

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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.