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Finding the Fourth Proportional to 15,018.56, 20,724.77 and 8,303.78

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Solution

The fourth proportional to 15,018.56, 20,724.77 and 8,303.78 is: 11,458.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,018.56 : 20,724.77 = 8,303.78 : x
  2. Step 2: Convert to fraction form
    15,018.56/20,724.77 = 8,303.78/x
  3. Step 3: Cross multiply
    15,018.56x = 20,724.77 × 8,303.78
  4. Step 4: Simplify right side
    15,018.56x = 172,093,894.34
  5. Step 5: Solve for x
    x = 172,093,894.34/15,018.56
  6. Step 6: Final answer
    x = 11,458.75

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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.