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Finding the Fourth Proportional to 18,400.80, 25,393.12 and 10,017.12

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Solution

The fourth proportional to 18,400.80, 25,393.12 and 10,017.12 is: 13,823.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,400.80 : 25,393.12 = 10,017.12 : x
  2. Step 2: Convert to fraction form
    18,400.80/25,393.12 = 10,017.12/x
  3. Step 3: Cross multiply
    18,400.80x = 25,393.12 × 10,017.12
  4. Step 4: Simplify right side
    18,400.80x = 254,365,930.21
  5. Step 5: Solve for x
    x = 254,365,930.21/18,400.80
  6. Step 6: Final answer
    x = 13,823.63

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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.