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Finding the Fourth Proportional to 12,803.60, 19,205.40 and 12,717.20

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Solution

The fourth proportional to 12,803.60, 19,205.40 and 12,717.20 is: 19,075.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,803.60 : 19,205.40 = 12,717.20 : x
  2. Step 2: Convert to fraction form
    12,803.60/19,205.40 = 12,717.20/x
  3. Step 3: Cross multiply
    12,803.60x = 19,205.40 × 12,717.20
  4. Step 4: Simplify right side
    12,803.60x = 244,238,912.88
  5. Step 5: Solve for x
    x = 244,238,912.88/12,803.60
  6. Step 6: Final answer
    x = 19,075.80

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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.