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Finding the Fourth Proportional to 12,757.80, 19,136.70 and 11,068.20

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Solution

The fourth proportional to 12,757.80, 19,136.70 and 11,068.20 is: 16,602.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,757.80 : 19,136.70 = 11,068.20 : x
  2. Step 2: Convert to fraction form
    12,757.80/19,136.70 = 11,068.20/x
  3. Step 3: Cross multiply
    12,757.80x = 19,136.70 × 11,068.20
  4. Step 4: Simplify right side
    12,757.80x = 211,808,822.94
  5. Step 5: Solve for x
    x = 211,808,822.94/12,757.80
  6. Step 6: Final answer
    x = 16,602.30

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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.