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Finding the Fourth Proportional to 15,912.12, 21,961.02 and 9,539.04

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Solution

The fourth proportional to 15,912.12, 21,961.02 and 9,539.04 is: 13,165.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,912.12 : 21,961.02 = 9,539.04 : x
  2. Step 2: Convert to fraction form
    15,912.12/21,961.02 = 9,539.04/x
  3. Step 3: Cross multiply
    15,912.12x = 21,961.02 × 9,539.04
  4. Step 4: Simplify right side
    15,912.12x = 209,487,048.22
  5. Step 5: Solve for x
    x = 209,487,048.22/15,912.12
  6. Step 6: Final answer
    x = 13,165.25

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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.