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Finding the Fourth Proportional to 15,077.21, 20,807.69 and 8,362.78

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Solution

The fourth proportional to 15,077.21, 20,807.69 and 8,362.78 is: 11,541.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,077.21 : 20,807.69 = 8,362.78 : x
  2. Step 2: Convert to fraction form
    15,077.21/20,807.69 = 8,362.78/x
  3. Step 3: Cross multiply
    15,077.21x = 20,807.69 × 8,362.78
  4. Step 4: Simplify right side
    15,077.21x = 174,010,039.95
  5. Step 5: Solve for x
    x = 174,010,039.95/15,077.21
  6. Step 6: Final answer
    x = 11,541.27

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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.