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Finding the Fourth Proportional to 28,269, 39,019.80 and 16,340.76

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Solution

The fourth proportional to 28,269, 39,019.80 and 16,340.76 is: 22,555.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,269 : 39,019.80 = 16,340.76 : x
  2. Step 2: Convert to fraction form
    28,269/39,019.80 = 16,340.76/x
  3. Step 3: Cross multiply
    28,269x = 39,019.80 × 16,340.76
  4. Step 4: Simplify right side
    28,269x = 637,613,187.05
  5. Step 5: Solve for x
    x = 637,613,187.05/28,269
  6. Step 6: Final answer
    x = 22,555.21

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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.