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Finding the Fourth Proportional to 34,687.62, 47,865.78 and 21,256.20

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Solution

The fourth proportional to 34,687.62, 47,865.78 and 21,256.20 is: 29,331.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    34,687.62 : 47,865.78 = 21,256.20 : x
  2. Step 2: Convert to fraction form
    34,687.62/47,865.78 = 21,256.20/x
  3. Step 3: Cross multiply
    34,687.62x = 47,865.78 × 21,256.20
  4. Step 4: Simplify right side
    34,687.62x = 1,017,444,592.84
  5. Step 5: Solve for x
    x = 1,017,444,592.84/34,687.62
  6. Step 6: Final answer
    x = 29,331.63

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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.