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Finding the Fourth Proportional to 19,389.60, 29,019.60 and 17,056.80

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Solution

The fourth proportional to 19,389.60, 29,019.60 and 17,056.80 is: 25,528.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,389.60 : 29,019.60 = 17,056.80 : x
  2. Step 2: Convert to fraction form
    19,389.60/29,019.60 = 17,056.80/x
  3. Step 3: Cross multiply
    19,389.60x = 29,019.60 × 17,056.80
  4. Step 4: Simplify right side
    19,389.60x = 494,981,513.28
  5. Step 5: Solve for x
    x = 494,981,513.28/19,389.60
  6. Step 6: Final answer
    x = 25,528.20

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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.