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Finding the Fourth Proportional to 14,921.18, 20,601.32 and 9,258.22

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Solution

The fourth proportional to 14,921.18, 20,601.32 and 9,258.22 is: 12,782.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,921.18 : 20,601.32 = 9,258.22 : x
  2. Step 2: Convert to fraction form
    14,921.18/20,601.32 = 9,258.22/x
  3. Step 3: Cross multiply
    14,921.18x = 20,601.32 × 9,258.22
  4. Step 4: Simplify right side
    14,921.18x = 190,731,552.85
  5. Step 5: Solve for x
    x = 190,731,552.85/14,921.18
  6. Step 6: Final answer
    x = 12,782.61

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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.