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Finding the Fourth Proportional to 20,999.25, 31,499.01 and 5,417.01

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Solution

The fourth proportional to 20,999.25, 31,499.01 and 5,417.01 is: 8,125.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,999.25 : 31,499.01 = 5,417.01 : x
  2. Step 2: Convert to fraction form
    20,999.25/31,499.01 = 5,417.01/x
  3. Step 3: Cross multiply
    20,999.25x = 31,499.01 × 5,417.01
  4. Step 4: Simplify right side
    20,999.25x = 170,630,452.16
  5. Step 5: Solve for x
    x = 170,630,452.16/20,999.25
  6. Step 6: Final answer
    x = 8,125.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.