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Finding the Fourth Proportional to 19,211.60, 28,817.40 and 11,416.40

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Solution

The fourth proportional to 19,211.60, 28,817.40 and 11,416.40 is: 17,124.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,211.60 : 28,817.40 = 11,416.40 : x
  2. Step 2: Convert to fraction form
    19,211.60/28,817.40 = 11,416.40/x
  3. Step 3: Cross multiply
    19,211.60x = 28,817.40 × 11,416.40
  4. Step 4: Simplify right side
    19,211.60x = 328,990,965.36
  5. Step 5: Solve for x
    x = 328,990,965.36/19,211.60
  6. Step 6: Final answer
    x = 17,124.60

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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.