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Finding the Fourth Proportional to 20,239.60, 30,359.40 and 19,008.40

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Solution

The fourth proportional to 20,239.60, 30,359.40 and 19,008.40 is: 28,512.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,239.60 : 30,359.40 = 19,008.40 : x
  2. Step 2: Convert to fraction form
    20,239.60/30,359.40 = 19,008.40/x
  3. Step 3: Cross multiply
    20,239.60x = 30,359.40 × 19,008.40
  4. Step 4: Simplify right side
    20,239.60x = 577,083,618.96
  5. Step 5: Solve for x
    x = 577,083,618.96/20,239.60
  6. Step 6: Final answer
    x = 28,512.60

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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.