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Finding the Fourth Proportional to 18,643.97, 25,698.81 and 12,592.31

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Solution

The fourth proportional to 18,643.97, 25,698.81 and 12,592.31 is: 17,357.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,643.97 : 25,698.81 = 12,592.31 : x
  2. Step 2: Convert to fraction form
    18,643.97/25,698.81 = 12,592.31/x
  3. Step 3: Cross multiply
    18,643.97x = 25,698.81 × 12,592.31
  4. Step 4: Simplify right side
    18,643.97x = 323,607,488.42
  5. Step 5: Solve for x
    x = 323,607,488.42/18,643.97
  6. Step 6: Final answer
    x = 17,357.22

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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.