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Finding the Fourth Proportional to 28,145, 42,229.66 and 14,993.64

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Solution

The fourth proportional to 28,145, 42,229.66 and 14,993.64 is: 22,496.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,145 : 42,229.66 = 14,993.64 : x
  2. Step 2: Convert to fraction form
    28,145/42,229.66 = 14,993.64/x
  3. Step 3: Cross multiply
    28,145x = 42,229.66 × 14,993.64
  4. Step 4: Simplify right side
    28,145x = 633,176,319.36
  5. Step 5: Solve for x
    x = 633,176,319.36/28,145
  6. Step 6: Final answer
    x = 22,496.94

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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.