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Finding the Fourth Proportional to 28,165.66, 38,846.88 and 19,664.98

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Solution

The fourth proportional to 28,165.66, 38,846.88 and 19,664.98 is: 27,122.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,165.66 : 38,846.88 = 19,664.98 : x
  2. Step 2: Convert to fraction form
    28,165.66/38,846.88 = 19,664.98/x
  3. Step 3: Cross multiply
    28,165.66x = 38,846.88 × 19,664.98
  4. Step 4: Simplify right side
    28,165.66x = 763,923,118.26
  5. Step 5: Solve for x
    x = 763,923,118.26/28,165.66
  6. Step 6: Final answer
    x = 27,122.50

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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.