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Finding the Fourth Proportional to 20,609.89, 30,888.91 and 14,777.89

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Solution

The fourth proportional to 20,609.89, 30,888.91 and 14,777.89 is: 22,148.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,609.89 : 30,888.91 = 14,777.89 : x
  2. Step 2: Convert to fraction form
    20,609.89/30,888.91 = 14,777.89/x
  3. Step 3: Cross multiply
    20,609.89x = 30,888.91 × 14,777.89
  4. Step 4: Simplify right side
    20,609.89x = 456,472,914.20
  5. Step 5: Solve for x
    x = 456,472,914.20/20,609.89
  6. Step 6: Final answer
    x = 22,148.25

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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.