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Finding the Fourth Proportional to 18,409.80, 25,406.58 and 10,860.54

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Solution

The fourth proportional to 18,409.80, 25,406.58 and 10,860.54 is: 14,988.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,409.80 : 25,406.58 = 10,860.54 : x
  2. Step 2: Convert to fraction form
    18,409.80/25,406.58 = 10,860.54/x
  3. Step 3: Cross multiply
    18,409.80x = 25,406.58 × 10,860.54
  4. Step 4: Simplify right side
    18,409.80x = 275,929,178.35
  5. Step 5: Solve for x
    x = 275,929,178.35/18,409.80
  6. Step 6: Final answer
    x = 14,988.17

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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.