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Finding the Fourth Proportional to 19,065.60, 28,630.80 and 14,140.80

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Solution

The fourth proportional to 19,065.60, 28,630.80 and 14,140.80 is: 21,235.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,065.60 : 28,630.80 = 14,140.80 : x
  2. Step 2: Convert to fraction form
    19,065.60/28,630.80 = 14,140.80/x
  3. Step 3: Cross multiply
    19,065.60x = 28,630.80 × 14,140.80
  4. Step 4: Simplify right side
    19,065.60x = 404,862,416.64
  5. Step 5: Solve for x
    x = 404,862,416.64/19,065.60
  6. Step 6: Final answer
    x = 21,235.23

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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.