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Finding the Fourth Proportional to 43,291.70, 64,905.87 and 13,692.98

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Solution

The fourth proportional to 43,291.70, 64,905.87 and 13,692.98 is: 20,529.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,291.70 : 64,905.87 = 13,692.98 : x
  2. Step 2: Convert to fraction form
    43,291.70/64,905.87 = 13,692.98/x
  3. Step 3: Cross multiply
    43,291.70x = 64,905.87 × 13,692.98
  4. Step 4: Simplify right side
    43,291.70x = 888,754,779.79
  5. Step 5: Solve for x
    x = 888,754,779.79/43,291.70
  6. Step 6: Final answer
    x = 20,529.45

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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.