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Finding the Fourth Proportional to 15,055.54, 20,775.62 and 8,340.54

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Solution

The fourth proportional to 15,055.54, 20,775.62 and 8,340.54 is: 11,509.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,055.54 : 20,775.62 = 8,340.54 : x
  2. Step 2: Convert to fraction form
    15,055.54/20,775.62 = 8,340.54/x
  3. Step 3: Cross multiply
    15,055.54x = 20,775.62 × 8,340.54
  4. Step 4: Simplify right side
    15,055.54x = 173,279,889.63
  5. Step 5: Solve for x
    x = 173,279,889.63/15,055.54
  6. Step 6: Final answer
    x = 11,509.38

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Half 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.