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Finding the Fourth Proportional to 21,809.81, 32,724.43 and 7,955.57

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Solution

The fourth proportional to 21,809.81, 32,724.43 and 7,955.57 is: 11,936.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,809.81 : 32,724.43 = 7,955.57 : x
  2. Step 2: Convert to fraction form
    21,809.81/32,724.43 = 7,955.57/x
  3. Step 3: Cross multiply
    21,809.81x = 32,724.43 × 7,955.57
  4. Step 4: Simplify right side
    21,809.81x = 260,341,290.18
  5. Step 5: Solve for x
    x = 260,341,290.18/21,809.81
  6. Step 6: Final answer
    x = 11,936.89

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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.