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Finding the Fourth Proportional to 21,925.62, 32,879.93 and 7,881.84

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Solution

The fourth proportional to 21,925.62, 32,879.93 and 7,881.84 is: 11,819.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,925.62 : 32,879.93 = 7,881.84 : x
  2. Step 2: Convert to fraction form
    21,925.62/32,879.93 = 7,881.84/x
  3. Step 3: Cross multiply
    21,925.62x = 32,879.93 × 7,881.84
  4. Step 4: Simplify right side
    21,925.62x = 259,154,308.06
  5. Step 5: Solve for x
    x = 259,154,308.06/21,925.62
  6. Step 6: Final answer
    x = 11,819.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.