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Finding the Fourth Proportional to 20,602.80, 30,871.20 and 20,056.08

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Solution

The fourth proportional to 20,602.80, 30,871.20 and 20,056.08 is: 30,052.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,602.80 : 30,871.20 = 20,056.08 : x
  2. Step 2: Convert to fraction form
    20,602.80/30,871.20 = 20,056.08/x
  3. Step 3: Cross multiply
    20,602.80x = 30,871.20 × 20,056.08
  4. Step 4: Simplify right side
    20,602.80x = 619,155,256.90
  5. Step 5: Solve for x
    x = 619,155,256.90/20,602.80
  6. Step 6: Final answer
    x = 30,052.00

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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.