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Finding the Fourth Proportional to 18,412.97, 25,409.13 and 10,455.63

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Solution

The fourth proportional to 18,412.97, 25,409.13 and 10,455.63 is: 14,428.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,412.97 : 25,409.13 = 10,455.63 : x
  2. Step 2: Convert to fraction form
    18,412.97/25,409.13 = 10,455.63/x
  3. Step 3: Cross multiply
    18,412.97x = 25,409.13 × 10,455.63
  4. Step 4: Simplify right side
    18,412.97x = 265,668,461.90
  5. Step 5: Solve for x
    x = 265,668,461.90/18,412.97
  6. Step 6: Final answer
    x = 14,428.34

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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.