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Finding the Fourth Proportional to 28,428.30, 39,220.07 and 16,489.44

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Solution

The fourth proportional to 28,428.30, 39,220.07 and 16,489.44 is: 22,749.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,428.30 : 39,220.07 = 16,489.44 : x
  2. Step 2: Convert to fraction form
    28,428.30/39,220.07 = 16,489.44/x
  3. Step 3: Cross multiply
    28,428.30x = 39,220.07 × 16,489.44
  4. Step 4: Simplify right side
    28,428.30x = 646,716,908.61
  5. Step 5: Solve for x
    x = 646,716,908.61/28,428.30
  6. Step 6: Final answer
    x = 22,749.05

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.