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Finding the Fourth Proportional to 15,363.68, 21,203.88 and 8,650.60

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Solution

The fourth proportional to 15,363.68, 21,203.88 and 8,650.60 is: 11,938.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,363.68 : 21,203.88 = 8,650.60 : x
  2. Step 2: Convert to fraction form
    15,363.68/21,203.88 = 8,650.60/x
  3. Step 3: Cross multiply
    15,363.68x = 21,203.88 × 8,650.60
  4. Step 4: Simplify right side
    15,363.68x = 183,426,198.88
  5. Step 5: Solve for x
    x = 183,426,198.88/15,363.68
  6. Step 6: Final answer
    x = 11,938.95

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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.