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Finding the Fourth Proportional to 21,903.60, 32,855.40 and 9,429.60

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Solution

The fourth proportional to 21,903.60, 32,855.40 and 9,429.60 is: 14,144.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,903.60 : 32,855.40 = 9,429.60 : x
  2. Step 2: Convert to fraction form
    21,903.60/32,855.40 = 9,429.60/x
  3. Step 3: Cross multiply
    21,903.60x = 32,855.40 × 9,429.60
  4. Step 4: Simplify right side
    21,903.60x = 309,813,279.84
  5. Step 5: Solve for x
    x = 309,813,279.84/21,903.60
  6. Step 6: Final answer
    x = 14,144.40

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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.