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Finding the Fourth Proportional to 22,992.60, 31,728.60 and 12,921.46

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Solution

The fourth proportional to 22,992.60, 31,728.60 and 12,921.46 is: 17,830.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,992.60 : 31,728.60 = 12,921.46 : x
  2. Step 2: Convert to fraction form
    22,992.60/31,728.60 = 12,921.46/x
  3. Step 3: Cross multiply
    22,992.60x = 31,728.60 × 12,921.46
  4. Step 4: Simplify right side
    22,992.60x = 409,979,835.76
  5. Step 5: Solve for x
    x = 409,979,835.76/22,992.60
  6. Step 6: Final answer
    x = 17,830.95

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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.