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Finding the Fourth Proportional to 30,587.92, 45,850.90 and 20,728.20

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Solution

The fourth proportional to 30,587.92, 45,850.90 and 20,728.20 is: 31,071.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,587.92 : 45,850.90 = 20,728.20 : x
  2. Step 2: Convert to fraction form
    30,587.92/45,850.90 = 20,728.20/x
  3. Step 3: Cross multiply
    30,587.92x = 45,850.90 × 20,728.20
  4. Step 4: Simplify right side
    30,587.92x = 950,406,625.38
  5. Step 5: Solve for x
    x = 950,406,625.38/30,587.92
  6. Step 6: Final answer
    x = 31,071.31

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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.