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Finding the Fourth Proportional to 15,564, 21,480.12 and 8,850.63

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Solution

The fourth proportional to 15,564, 21,480.12 and 8,850.63 is: 12,214.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,564 : 21,480.12 = 8,850.63 : x
  2. Step 2: Convert to fraction form
    15,564/21,480.12 = 8,850.63/x
  3. Step 3: Cross multiply
    15,564x = 21,480.12 × 8,850.63
  4. Step 4: Simplify right side
    15,564x = 190,112,594.48
  5. Step 5: Solve for x
    x = 190,112,594.48/15,564
  6. Step 6: Final answer
    x = 12,214.89

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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.