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Finding the Fourth Proportional to 21,809.34, 32,687.64 and 9,946.89

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Solution

The fourth proportional to 21,809.34, 32,687.64 and 9,946.89 is: 14,908.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,809.34 : 32,687.64 = 9,946.89 : x
  2. Step 2: Convert to fraction form
    21,809.34/32,687.64 = 9,946.89/x
  3. Step 3: Cross multiply
    21,809.34x = 32,687.64 × 9,946.89
  4. Step 4: Simplify right side
    21,809.34x = 325,140,359.44
  5. Step 5: Solve for x
    x = 325,140,359.44/21,809.34
  6. Step 6: Final answer
    x = 14,908.31

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.