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Finding the Fourth Proportional to 57,018.54, 85,531.32 and 21,958.23

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Solution

The fourth proportional to 57,018.54, 85,531.32 and 21,958.23 is: 32,938.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,018.54 : 85,531.32 = 21,958.23 : x
  2. Step 2: Convert to fraction form
    57,018.54/85,531.32 = 21,958.23/x
  3. Step 3: Cross multiply
    57,018.54x = 85,531.32 × 21,958.23
  4. Step 4: Simplify right side
    57,018.54x = 1,878,116,396.76
  5. Step 5: Solve for x
    x = 1,878,116,396.76/57,018.54
  6. Step 6: Final answer
    x = 32,938.70

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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.