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Finding the Fourth Proportional to 21,909.40, 32,880.30 and 14,511.40

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Solution

The fourth proportional to 21,909.40, 32,880.30 and 14,511.40 is: 21,777.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,909.40 : 32,880.30 = 14,511.40 : x
  2. Step 2: Convert to fraction form
    21,909.40/32,880.30 = 14,511.40/x
  3. Step 3: Cross multiply
    21,909.40x = 32,880.30 × 14,511.40
  4. Step 4: Simplify right side
    21,909.40x = 477,139,185.42
  5. Step 5: Solve for x
    x = 477,139,185.42/21,909.40
  6. Step 6: Final answer
    x = 21,777.83

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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.