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Finding the Fourth Proportional to 18,712.57, 25,823.88 and 10,215.22

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Solution

The fourth proportional to 18,712.57, 25,823.88 and 10,215.22 is: 14,097.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,712.57 : 25,823.88 = 10,215.22 : x
  2. Step 2: Convert to fraction form
    18,712.57/25,823.88 = 10,215.22/x
  3. Step 3: Cross multiply
    18,712.57x = 25,823.88 × 10,215.22
  4. Step 4: Simplify right side
    18,712.57x = 263,796,615.45
  5. Step 5: Solve for x
    x = 263,796,615.45/18,712.57
  6. Step 6: Final answer
    x = 14,097.29

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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.