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Finding the Fourth Proportional to 18,572.97, 25,640.64 and 14,345.91

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Solution

The fourth proportional to 18,572.97, 25,640.64 and 14,345.91 is: 19,805.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,572.97 : 25,640.64 = 14,345.91 : x
  2. Step 2: Convert to fraction form
    18,572.97/25,640.64 = 14,345.91/x
  3. Step 3: Cross multiply
    18,572.97x = 25,640.64 × 14,345.91
  4. Step 4: Simplify right side
    18,572.97x = 367,838,313.78
  5. Step 5: Solve for x
    x = 367,838,313.78/18,572.97
  6. Step 6: Final answer
    x = 19,805.03

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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.