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Finding the Fourth Proportional to 18,666.62, 25,792.74 and 14,920.72

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Solution

The fourth proportional to 18,666.62, 25,792.74 and 14,920.72 is: 20,616.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,666.62 : 25,792.74 = 14,920.72 : x
  2. Step 2: Convert to fraction form
    18,666.62/25,792.74 = 14,920.72/x
  3. Step 3: Cross multiply
    18,666.62x = 25,792.74 × 14,920.72
  4. Step 4: Simplify right side
    18,666.62x = 384,846,251.57
  5. Step 5: Solve for x
    x = 384,846,251.57/18,666.62
  6. Step 6: Final answer
    x = 20,616.82

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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.