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Finding the Fourth Proportional to 21,899.60, 32,827.80 and 8,734.40

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Solution

The fourth proportional to 21,899.60, 32,827.80 and 8,734.40 is: 13,092.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,899.60 : 32,827.80 = 8,734.40 : x
  2. Step 2: Convert to fraction form
    21,899.60/32,827.80 = 8,734.40/x
  3. Step 3: Cross multiply
    21,899.60x = 32,827.80 × 8,734.40
  4. Step 4: Simplify right side
    21,899.60x = 286,731,136.32
  5. Step 5: Solve for x
    x = 286,731,136.32/21,899.60
  6. Step 6: Final answer
    x = 13,092.99

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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.