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Finding the Fourth Proportional to 13,240.80, 19,909.80 and 11,102.40

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Solution

The fourth proportional to 13,240.80, 19,909.80 and 11,102.40 is: 16,694.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,240.80 : 19,909.80 = 11,102.40 : x
  2. Step 2: Convert to fraction form
    13,240.80/19,909.80 = 11,102.40/x
  3. Step 3: Cross multiply
    13,240.80x = 19,909.80 × 11,102.40
  4. Step 4: Simplify right side
    13,240.80x = 221,046,563.52
  5. Step 5: Solve for x
    x = 221,046,563.52/13,240.80
  6. Step 6: Final answer
    x = 16,694.35

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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.