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Finding the Fourth Proportional to 21,878.69, 32,817.65 and 7,087.64

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Solution

The fourth proportional to 21,878.69, 32,817.65 and 7,087.64 is: 10,631.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,878.69 : 32,817.65 = 7,087.64 : x
  2. Step 2: Convert to fraction form
    21,878.69/32,817.65 = 7,087.64/x
  3. Step 3: Cross multiply
    21,878.69x = 32,817.65 × 7,087.64
  4. Step 4: Simplify right side
    21,878.69x = 232,599,788.61
  5. Step 5: Solve for x
    x = 232,599,788.61/21,878.69
  6. Step 6: Final answer
    x = 10,631.34

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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.