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Finding the Fourth Proportional to 21,955.74, 32,938.84 and 7,164.66

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Solution

The fourth proportional to 21,955.74, 32,938.84 and 7,164.66 is: 10,748.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,955.74 : 32,938.84 = 7,164.66 : x
  2. Step 2: Convert to fraction form
    21,955.74/32,938.84 = 7,164.66/x
  3. Step 3: Cross multiply
    21,955.74x = 32,938.84 × 7,164.66
  4. Step 4: Simplify right side
    21,955.74x = 235,995,589.39
  5. Step 5: Solve for x
    x = 235,995,589.39/21,955.74
  6. Step 6: Final answer
    x = 10,748.70

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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.