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Finding the Fourth Proportional to 30,137.05, 45,199.90 and 10,415.71

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Solution

The fourth proportional to 30,137.05, 45,199.90 and 10,415.71 is: 15,621.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,137.05 : 45,199.90 = 10,415.71 : x
  2. Step 2: Convert to fraction form
    30,137.05/45,199.90 = 10,415.71/x
  3. Step 3: Cross multiply
    30,137.05x = 45,199.90 × 10,415.71
  4. Step 4: Simplify right side
    30,137.05x = 470,789,050.43
  5. Step 5: Solve for x
    x = 470,789,050.43/30,137.05
  6. Step 6: Final answer
    x = 15,621.60

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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.