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Finding the Fourth Proportional to 30,302.80, 45,346.20 and 19,214.80

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Solution

The fourth proportional to 30,302.80, 45,346.20 and 19,214.80 is: 28,753.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,302.80 : 45,346.20 = 19,214.80 : x
  2. Step 2: Convert to fraction form
    30,302.80/45,346.20 = 19,214.80/x
  3. Step 3: Cross multiply
    30,302.80x = 45,346.20 × 19,214.80
  4. Step 4: Simplify right side
    30,302.80x = 871,318,163.76
  5. Step 5: Solve for x
    x = 871,318,163.76/30,302.80
  6. Step 6: Final answer
    x = 28,753.72

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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.