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Finding the Fourth Proportional to 18,407.91, 25,403.90 and 10,858.66

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Solution

The fourth proportional to 18,407.91, 25,403.90 and 10,858.66 is: 14,985.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,407.91 : 25,403.90 = 10,858.66 : x
  2. Step 2: Convert to fraction form
    18,407.91/25,403.90 = 10,858.66/x
  3. Step 3: Cross multiply
    18,407.91x = 25,403.90 × 10,858.66
  4. Step 4: Simplify right side
    18,407.91x = 275,852,286.59
  5. Step 5: Solve for x
    x = 275,852,286.59/18,407.91
  6. Step 6: Final answer
    x = 14,985.53

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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.