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Finding the Fourth Proportional to 30,147.46, 45,215.03 and 11,421.04

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Solution

The fourth proportional to 30,147.46, 45,215.03 and 11,421.04 is: 17,129.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,147.46 : 45,215.03 = 11,421.04 : x
  2. Step 2: Convert to fraction form
    30,147.46/45,215.03 = 11,421.04/x
  3. Step 3: Cross multiply
    30,147.46x = 45,215.03 × 11,421.04
  4. Step 4: Simplify right side
    30,147.46x = 516,402,383.05
  5. Step 5: Solve for x
    x = 516,402,383.05/30,147.46
  6. Step 6: Final answer
    x = 17,129.22

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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.