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Finding the Fourth Proportional to 28,506.60, 42,753.60 and 20,163.06

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Solution

The fourth proportional to 28,506.60, 42,753.60 and 20,163.06 is: 30,240.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,506.60 : 42,753.60 = 20,163.06 : x
  2. Step 2: Convert to fraction form
    28,506.60/42,753.60 = 20,163.06/x
  3. Step 3: Cross multiply
    28,506.60x = 42,753.60 × 20,163.06
  4. Step 4: Simplify right side
    28,506.60x = 862,043,402.02
  5. Step 5: Solve for x
    x = 862,043,402.02/28,506.60
  6. Step 6: Final answer
    x = 30,240.13

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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.