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Finding the Fourth Proportional to 15,903.54, 21,955.10 and 11,208.78

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Solution

The fourth proportional to 15,903.54, 21,955.10 and 11,208.78 is: 15,473.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,903.54 : 21,955.10 = 11,208.78 : x
  2. Step 2: Convert to fraction form
    15,903.54/21,955.10 = 11,208.78/x
  3. Step 3: Cross multiply
    15,903.54x = 21,955.10 × 11,208.78
  4. Step 4: Simplify right side
    15,903.54x = 246,089,829.73
  5. Step 5: Solve for x
    x = 246,089,829.73/15,903.54
  6. Step 6: Final answer
    x = 15,473.90

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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.