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Finding the Fourth Proportional to 15,108, 20,850.32 and 8,485.28

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Solution

The fourth proportional to 15,108, 20,850.32 and 8,485.28 is: 11,710.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,108 : 20,850.32 = 8,485.28 : x
  2. Step 2: Convert to fraction form
    15,108/20,850.32 = 8,485.28/x
  3. Step 3: Cross multiply
    15,108x = 20,850.32 × 8,485.28
  4. Step 4: Simplify right side
    15,108x = 176,920,803.29
  5. Step 5: Solve for x
    x = 176,920,803.29/15,108
  6. Step 6: Final answer
    x = 11,710.41

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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.