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Finding the Fourth Proportional to 22,157.01, 30,579.93 and 13,209.75

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Solution

The fourth proportional to 22,157.01, 30,579.93 and 13,209.75 is: 18,231.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,157.01 : 30,579.93 = 13,209.75 : x
  2. Step 2: Convert to fraction form
    22,157.01/30,579.93 = 13,209.75/x
  3. Step 3: Cross multiply
    22,157.01x = 30,579.93 × 13,209.75
  4. Step 4: Simplify right side
    22,157.01x = 403,953,230.32
  5. Step 5: Solve for x
    x = 403,953,230.32/22,157.01
  6. Step 6: Final answer
    x = 18,231.40

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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.