Home / 19,871.20-29,778.78-15,692.80

Finding the Fourth Proportional to 19,871.20, 29,778.78 and 15,692.80

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Solution

The fourth proportional to 19,871.20, 29,778.78 and 15,692.80 is: 23,517.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,871.20 : 29,778.78 = 15,692.80 : x
  2. Step 2: Convert to fraction form
    19,871.20/29,778.78 = 15,692.80/x
  3. Step 3: Cross multiply
    19,871.20x = 29,778.78 × 15,692.80
  4. Step 4: Simplify right side
    19,871.20x = 467,312,438.78
  5. Step 5: Solve for x
    x = 467,312,438.78/19,871.20
  6. Step 6: Final answer
    x = 23,517.07

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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.