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Finding the Fourth Proportional to 15,563.78, 21,478.23 and 8,849.39

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Solution

The fourth proportional to 15,563.78, 21,478.23 and 8,849.39 is: 12,212.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,563.78 : 21,478.23 = 8,849.39 : x
  2. Step 2: Convert to fraction form
    15,563.78/21,478.23 = 8,849.39/x
  3. Step 3: Cross multiply
    15,563.78x = 21,478.23 × 8,849.39
  4. Step 4: Simplify right side
    15,563.78x = 190,069,126.39
  5. Step 5: Solve for x
    x = 190,069,126.39/15,563.78
  6. Step 6: Final answer
    x = 12,212.28

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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.