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Finding the Fourth Proportional to 21,904.40, 32,859.84 and 8,756.48

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Solution

The fourth proportional to 21,904.40, 32,859.84 and 8,756.48 is: 13,136.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,904.40 : 32,859.84 = 8,756.48 : x
  2. Step 2: Convert to fraction form
    21,904.40/32,859.84 = 8,756.48/x
  3. Step 3: Cross multiply
    21,904.40x = 32,859.84 × 8,756.48
  4. Step 4: Simplify right side
    21,904.40x = 287,736,531.76
  5. Step 5: Solve for x
    x = 287,736,531.76/21,904.40
  6. Step 6: Final answer
    x = 13,136.02

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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.