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Finding the Fourth Proportional to 15,241.50, 21,034.08 and 8,955.90

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Solution

The fourth proportional to 15,241.50, 21,034.08 and 8,955.90 is: 12,359.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,241.50 : 21,034.08 = 8,955.90 : x
  2. Step 2: Convert to fraction form
    15,241.50/21,034.08 = 8,955.90/x
  3. Step 3: Cross multiply
    15,241.50x = 21,034.08 × 8,955.90
  4. Step 4: Simplify right side
    15,241.50x = 188,379,117.07
  5. Step 5: Solve for x
    x = 188,379,117.07/15,241.50
  6. Step 6: Final answer
    x = 12,359.62

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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.