Home / 21,124.20-29,152.80-11,692.80

Finding the Fourth Proportional to 21,124.20, 29,152.80 and 11,692.80

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Solution

The fourth proportional to 21,124.20, 29,152.80 and 11,692.80 is: 16,136.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,124.20 : 29,152.80 = 11,692.80 : x
  2. Step 2: Convert to fraction form
    21,124.20/29,152.80 = 11,692.80/x
  3. Step 3: Cross multiply
    21,124.20x = 29,152.80 × 11,692.80
  4. Step 4: Simplify right side
    21,124.20x = 340,877,859.84
  5. Step 5: Solve for x
    x = 340,877,859.84/21,124.20
  6. Step 6: Final answer
    x = 16,136.84

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.