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Finding the Fourth Proportional to 21,955.37, 32,919.71 and 8,612.38

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Solution

The fourth proportional to 21,955.37, 32,919.71 and 8,612.38 is: 12,913.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,955.37 : 32,919.71 = 8,612.38 : x
  2. Step 2: Convert to fraction form
    21,955.37/32,919.71 = 8,612.38/x
  3. Step 3: Cross multiply
    21,955.37x = 32,919.71 × 8,612.38
  4. Step 4: Simplify right side
    21,955.37x = 283,516,958.95
  5. Step 5: Solve for x
    x = 283,516,958.95/21,955.37
  6. Step 6: Final answer
    x = 12,913.33

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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.