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Finding the Fourth Proportional to 23,419.20, 35,128.80 and 16,420.80

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Solution

The fourth proportional to 23,419.20, 35,128.80 and 16,420.80 is: 24,631.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    23,419.20 : 35,128.80 = 16,420.80 : x
  2. Step 2: Convert to fraction form
    23,419.20/35,128.80 = 16,420.80/x
  3. Step 3: Cross multiply
    23,419.20x = 35,128.80 × 16,420.80
  4. Step 4: Simplify right side
    23,419.20x = 576,842,999.04
  5. Step 5: Solve for x
    x = 576,842,999.04/23,419.20
  6. Step 6: Final answer
    x = 24,631.20

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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.