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Finding the Fourth Proportional to 30,221.51, 45,028.51 and 28,523.81

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Solution

The fourth proportional to 30,221.51, 45,028.51 and 28,523.81 is: 42,499.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,221.51 : 45,028.51 = 28,523.81 : x
  2. Step 2: Convert to fraction form
    30,221.51/45,028.51 = 28,523.81/x
  3. Step 3: Cross multiply
    30,221.51x = 45,028.51 × 28,523.81
  4. Step 4: Simplify right side
    30,221.51x = 1,284,384,705.08
  5. Step 5: Solve for x
    x = 1,284,384,705.08/30,221.51
  6. Step 6: Final answer
    x = 42,499.03

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.