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Finding the Fourth Proportional to 20,871.88, 28,807.18 and 16,325.55

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Solution

The fourth proportional to 20,871.88, 28,807.18 and 16,325.55 is: 22,532.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,871.88 : 28,807.18 = 16,325.55 : x
  2. Step 2: Convert to fraction form
    20,871.88/28,807.18 = 16,325.55/x
  3. Step 3: Cross multiply
    20,871.88x = 28,807.18 × 16,325.55
  4. Step 4: Simplify right side
    20,871.88x = 470,293,016.64
  5. Step 5: Solve for x
    x = 470,293,016.64/20,871.88
  6. Step 6: Final answer
    x = 22,532.38

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.