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Finding the Fourth Proportional to 28,933.60, 43,389.60 and 20,142.40

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Solution

The fourth proportional to 28,933.60, 43,389.60 and 20,142.40 is: 30,206.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,933.60 : 43,389.60 = 20,142.40 : x
  2. Step 2: Convert to fraction form
    28,933.60/43,389.60 = 20,142.40/x
  3. Step 3: Cross multiply
    28,933.60x = 43,389.60 × 20,142.40
  4. Step 4: Simplify right side
    28,933.60x = 873,970,679.04
  5. Step 5: Solve for x
    x = 873,970,679.04/28,933.60
  6. Step 6: Final answer
    x = 30,206.08

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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.