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Finding the Fourth Proportional to 15,054.78, 20,775.58 and 8,340.83

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Solution

The fourth proportional to 15,054.78, 20,775.58 and 8,340.83 is: 11,510.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,054.78 : 20,775.58 = 8,340.83 : x
  2. Step 2: Convert to fraction form
    15,054.78/20,775.58 = 8,340.83/x
  3. Step 3: Cross multiply
    15,054.78x = 20,775.58 × 8,340.83
  4. Step 4: Simplify right side
    15,054.78x = 173,285,580.93
  5. Step 5: Solve for x
    x = 173,285,580.93/15,054.78
  6. Step 6: Final answer
    x = 11,510.34

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Double scale
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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.