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Finding the Fourth Proportional to 15,699.30, 21,664.92 and 9,411.66

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Solution

The fourth proportional to 15,699.30, 21,664.92 and 9,411.66 is: 12,988.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,699.30 : 21,664.92 = 9,411.66 : x
  2. Step 2: Convert to fraction form
    15,699.30/21,664.92 = 9,411.66/x
  3. Step 3: Cross multiply
    15,699.30x = 21,664.92 × 9,411.66
  4. Step 4: Simplify right side
    15,699.30x = 203,902,860.97
  5. Step 5: Solve for x
    x = 203,902,860.97/15,699.30
  6. Step 6: Final answer
    x = 12,988.02

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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.