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Finding the Fourth Proportional to 30,139.64, 45,209.02 and 7,343.56

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Solution

The fourth proportional to 30,139.64, 45,209.02 and 7,343.56 is: 11,015.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,139.64 : 45,209.02 = 7,343.56 : x
  2. Step 2: Convert to fraction form
    30,139.64/45,209.02 = 7,343.56/x
  3. Step 3: Cross multiply
    30,139.64x = 45,209.02 × 7,343.56
  4. Step 4: Simplify right side
    30,139.64x = 331,995,150.91
  5. Step 5: Solve for x
    x = 331,995,150.91/30,139.64
  6. Step 6: Final answer
    x = 11,015.23

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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.