Home / 45,120.56-67,692.36-13,530.50

Finding the Fourth Proportional to 45,120.56, 67,692.36 and 13,530.50

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Solution

The fourth proportional to 45,120.56, 67,692.36 and 13,530.50 is: 20,299.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,120.56 : 67,692.36 = 13,530.50 : x
  2. Step 2: Convert to fraction form
    45,120.56/67,692.36 = 13,530.50/x
  3. Step 3: Cross multiply
    45,120.56x = 67,692.36 × 13,530.50
  4. Step 4: Simplify right side
    45,120.56x = 915,911,476.98
  5. Step 5: Solve for x
    x = 915,911,476.98/45,120.56
  6. Step 6: Final answer
    x = 20,299.20

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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.