Home / 12,457.78-18,686.70-3,692.80

Finding the Fourth Proportional to 12,457.78, 18,686.70 and 3,692.80

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Solution

The fourth proportional to 12,457.78, 18,686.70 and 3,692.80 is: 5,539.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,457.78 : 18,686.70 = 3,692.80 : x
  2. Step 2: Convert to fraction form
    12,457.78/18,686.70 = 3,692.80/x
  3. Step 3: Cross multiply
    12,457.78x = 18,686.70 × 3,692.80
  4. Step 4: Simplify right side
    12,457.78x = 69,006,245.76
  5. Step 5: Solve for x
    x = 69,006,245.76/12,457.78
  6. Step 6: Final answer
    x = 5,539.21

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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.