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Finding the Fourth Proportional to 42,796.60, 64,194.90 and 13,211.80

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Solution

The fourth proportional to 42,796.60, 64,194.90 and 13,211.80 is: 19,817.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,796.60 : 64,194.90 = 13,211.80 : x
  2. Step 2: Convert to fraction form
    42,796.60/64,194.90 = 13,211.80/x
  3. Step 3: Cross multiply
    42,796.60x = 64,194.90 × 13,211.80
  4. Step 4: Simplify right side
    42,796.60x = 848,130,179.82
  5. Step 5: Solve for x
    x = 848,130,179.82/42,796.60
  6. Step 6: Final answer
    x = 19,817.70

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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.