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Finding the Fourth Proportional to 15,199.20, 20,962.80 and 11,246.40

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Solution

The fourth proportional to 15,199.20, 20,962.80 and 11,246.40 is: 15,511.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,199.20 : 20,962.80 = 11,246.40 : x
  2. Step 2: Convert to fraction form
    15,199.20/20,962.80 = 11,246.40/x
  3. Step 3: Cross multiply
    15,199.20x = 20,962.80 × 11,246.40
  4. Step 4: Simplify right side
    15,199.20x = 235,756,033.92
  5. Step 5: Solve for x
    x = 235,756,033.92/15,199.20
  6. Step 6: Final answer
    x = 15,511.08

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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.