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Finding the Fourth Proportional to 30,136.01, 45,213.40 and 18,141.20

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Solution

The fourth proportional to 30,136.01, 45,213.40 and 18,141.20 is: 27,217.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,136.01 : 45,213.40 = 18,141.20 : x
  2. Step 2: Convert to fraction form
    30,136.01/45,213.40 = 18,141.20/x
  3. Step 3: Cross multiply
    30,136.01x = 45,213.40 × 18,141.20
  4. Step 4: Simplify right side
    30,136.01x = 820,225,106.01
  5. Step 5: Solve for x
    x = 820,225,106.01/30,136.01
  6. Step 6: Final answer
    x = 27,217.44

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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.