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Finding the Fourth Proportional to 18,703.85, 25,805.93 and 11,531.34

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Solution

The fourth proportional to 18,703.85, 25,805.93 and 11,531.34 is: 15,909.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,703.85 : 25,805.93 = 11,531.34 : x
  2. Step 2: Convert to fraction form
    18,703.85/25,805.93 = 11,531.34/x
  3. Step 3: Cross multiply
    18,703.85x = 25,805.93 × 11,531.34
  4. Step 4: Simplify right side
    18,703.85x = 297,576,895.19
  5. Step 5: Solve for x
    x = 297,576,895.19/18,703.85
  6. Step 6: Final answer
    x = 15,909.93

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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.