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Finding the Fourth Proportional to 57,881.40, 86,822.10 and 20,940.60

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Solution

The fourth proportional to 57,881.40, 86,822.10 and 20,940.60 is: 31,410.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,881.40 : 86,822.10 = 20,940.60 : x
  2. Step 2: Convert to fraction form
    57,881.40/86,822.10 = 20,940.60/x
  3. Step 3: Cross multiply
    57,881.40x = 86,822.10 × 20,940.60
  4. Step 4: Simplify right side
    57,881.40x = 1,818,106,867.26
  5. Step 5: Solve for x
    x = 1,818,106,867.26/57,881.40
  6. Step 6: Final answer
    x = 31,410.90

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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.