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Finding the Fourth Proportional to 30,607.80, 45,846.90 and 20,110.20

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Solution

The fourth proportional to 30,607.80, 45,846.90 and 20,110.20 is: 30,122.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,607.80 : 45,846.90 = 20,110.20 : x
  2. Step 2: Convert to fraction form
    30,607.80/45,846.90 = 20,110.20/x
  3. Step 3: Cross multiply
    30,607.80x = 45,846.90 × 20,110.20
  4. Step 4: Simplify right side
    30,607.80x = 921,990,328.38
  5. Step 5: Solve for x
    x = 921,990,328.38/30,607.80
  6. Step 6: Final answer
    x = 30,122.72

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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.