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Finding the Fourth Proportional to 18,390.75, 25,379.24 and 10,007.25

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Solution

The fourth proportional to 18,390.75, 25,379.24 and 10,007.25 is: 13,810.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,390.75 : 25,379.24 = 10,007.25 : x
  2. Step 2: Convert to fraction form
    18,390.75/25,379.24 = 10,007.25/x
  3. Step 3: Cross multiply
    18,390.75x = 25,379.24 × 10,007.25
  4. Step 4: Simplify right side
    18,390.75x = 253,976,349.45
  5. Step 5: Solve for x
    x = 253,976,349.45/18,390.75
  6. Step 6: Final answer
    x = 13,810.01

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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.