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Finding the Fourth Proportional to 28,963.99, 43,349.56 and 21,905.11

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Solution

The fourth proportional to 28,963.99, 43,349.56 and 21,905.11 is: 32,784.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,963.99 : 43,349.56 = 21,905.11 : x
  2. Step 2: Convert to fraction form
    28,963.99/43,349.56 = 21,905.11/x
  3. Step 3: Cross multiply
    28,963.99x = 43,349.56 × 21,905.11
  4. Step 4: Simplify right side
    28,963.99x = 949,576,880.25
  5. Step 5: Solve for x
    x = 949,576,880.25/28,963.99
  6. Step 6: Final answer
    x = 32,784.74

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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.