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Finding the Fourth Proportional to 15,363.61, 21,203.80 and 8,650.55

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Solution

The fourth proportional to 15,363.61, 21,203.80 and 8,650.55 is: 11,938.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,363.61 : 21,203.80 = 8,650.55 : x
  2. Step 2: Convert to fraction form
    15,363.61/21,203.80 = 8,650.55/x
  3. Step 3: Cross multiply
    15,363.61x = 21,203.80 × 8,650.55
  4. Step 4: Simplify right side
    15,363.61x = 183,424,532.09
  5. Step 5: Solve for x
    x = 183,424,532.09/15,363.61
  6. Step 6: Final answer
    x = 11,938.90

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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.