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Finding the Fourth Proportional to 21,969.53, 32,955.84 and 8,821.91

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Solution

The fourth proportional to 21,969.53, 32,955.84 and 8,821.91 is: 13,233.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,969.53 : 32,955.84 = 8,821.91 : x
  2. Step 2: Convert to fraction form
    21,969.53/32,955.84 = 8,821.91/x
  3. Step 3: Cross multiply
    21,969.53x = 32,955.84 × 8,821.91
  4. Step 4: Simplify right side
    21,969.53x = 290,733,454.45
  5. Step 5: Solve for x
    x = 290,733,454.45/21,969.53
  6. Step 6: Final answer
    x = 13,233.49

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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.